198929551 has 2 divisors, whose sum is σ = 198929552. Its totient is φ = 198929550.

The previous prime is 198929537. The next prime is 198929561. The reversal of 198929551 is 155929891.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 198929551 - 2⁹ = 198929039 is a prime.

It is a super-2 number, since 2×198929551² = 79145932522123202, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 198929495 and 198929504.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198929561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99464775 + 99464776.

It is an arithmetic number, because the mean of its divisors is an integer number (99464776).

Almost surely, 2^198929551 is an apocalyptic number.

198929551 is a deficient number, since it is larger than the sum of its proper divisors (1).

198929551 is an equidigital number, since it uses as much as digits as its factorization.

198929551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 291600, while the sum is 49.

The square root of 198929551 is about 14104.2387600324. The cubic root of 198929551 is about 583.7583434011.

The spelling of 198929551 in words is "one hundred ninety-eight million, nine hundred twenty-nine thousand, five hundred fifty-one".