261032397 has 4 divisors (see below), whose sum is σ = 348043200. Its totient is φ = 174021596.

The previous prime is 261032383. The next prime is 261032411. The reversal of 261032397 is 793230162.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (261032383) and next prime (261032411).

It is a cyclic number.

It is not a de Polignac number, because 261032397 - 2⁴ = 261032381 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261032327) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43505397 + ... + 43505402.

It is an arithmetic number, because the mean of its divisors is an integer number (87010800).

Almost surely, 2^261032397 is an apocalyptic number.

It is an amenable number.

261032397 is a deficient number, since it is larger than the sum of its proper divisors (87010803).

261032397 is an equidigital number, since it uses as much as digits as its factorization.

261032397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87010802.

The product of its (nonzero) digits is 13608, while the sum is 33.

The square root of 261032397 is about 16156.4970522697. The cubic root of 261032397 is about 639.0940934762.

It can be divided in two parts, 26103 and 2397, that multiplied together give a triangular number (62568891 = T₁₁₁₈₆).

The spelling of 261032397 in words is "two hundred sixty-one million, thirty-two thousand, three hundred ninety-seven".