261314929 has 2 divisors, whose sum is σ = 261314930. Its totient is φ = 261314928.

The previous prime is 261314927. The next prime is 261315031. The reversal of 261314929 is 929413162.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 236544400 + 24770529 = 15380^2 + 4977^2 .

It is a cyclic number.

It is not a de Polignac number, because 261314929 - 2¹ = 261314927 is a prime.

Together with 261314927, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (261314927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130657464 + 130657465.

It is an arithmetic number, because the mean of its divisors is an integer number (130657465).

Almost surely, 2^261314929 is an apocalyptic number.

It is an amenable number.

261314929 is a deficient number, since it is larger than the sum of its proper divisors (1).

261314929 is an equidigital number, since it uses as much as digits as its factorization.

261314929 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23328, while the sum is 37.

The square root of 261314929 is about 16165.2382908511. The cubic root of 261314929 is about 639.3245877598.

The spelling of 261314929 in words is "two hundred sixty-one million, three hundred fourteen thousand, nine hundred twenty-nine".