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198520739 is a prime number
BaseRepresentation
bin10111101010100…
…10111110100011
3111211112220020222
423311102332203
5401310130424
631410553255
74630253444
oct1365227643
9454486228
10198520739
11a207262a
125659882b
1332189bc1
141c5192cb
1512665e5e
hexbd52fa3

198520739 has 2 divisors, whose sum is σ = 198520740. Its totient is φ = 198520738.

The previous prime is 198520733. The next prime is 198520741. The reversal of 198520739 is 937025891.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-198520739 is a prime.

It is a super-2 number, since 2×1985207392 = 78820967626212242, which contains 22 as substring.

Together with 198520741, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 198520739.

It is not a weakly prime, because it can be changed into another prime (198520733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99260369 + 99260370.

It is an arithmetic number, because the mean of its divisors is an integer number (99260370).

Almost surely, 2198520739 is an apocalyptic number.

198520739 is a deficient number, since it is larger than the sum of its proper divisors (1).

198520739 is an equidigital number, since it uses as much as digits as its factorization.

198520739 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 136080, while the sum is 44.

The square root of 198520739 is about 14089.7387839520. The cubic root of 198520739 is about 583.3581831772.

The spelling of 198520739 in words is "one hundred ninety-eight million, five hundred twenty thousand, seven hundred thirty-nine".