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261113397 = 3127685337
BaseRepresentation
bin11111001000001…
…00011000110101
3200012022221020120
433210010120311
51013321112042
641524322153
76320266356
oct1744043065
9605287216
10261113397
111244343a6
1273543359
1342133c8c
142696dd2d
1517dcbdec
hexf904635

261113397 has 8 divisors (see below), whose sum is σ = 350893056. Its totient is φ = 172704672.

The previous prime is 261113393. The next prime is 261113399. The reversal of 261113397 is 793311162.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 261113397 - 22 = 261113393 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261113393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 342288 + ... + 343049.

It is an arithmetic number, because the mean of its divisors is an integer number (43861632).

Almost surely, 2261113397 is an apocalyptic number.

It is an amenable number.

261113397 is a deficient number, since it is larger than the sum of its proper divisors (89779659).

261113397 is a wasteful number, since it uses less digits than its factorization.

261113397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 685467.

The product of its digits is 6804, while the sum is 33.

The square root of 261113397 is about 16159.0035893306. The cubic root of 261113397 is about 639.1601916165.

The spelling of 261113397 in words is "two hundred sixty-one million, one hundred thirteen thousand, three hundred ninety-seven".

Divisors: 1 3 127 381 685337 2056011 87037799 261113397