261732097 has 4 divisors (see below), whose sum is σ = 285525936. Its totient is φ = 237938260.

The previous prime is 261732091. The next prime is 261732109. The reversal of 261732097 is 790237162.

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 a cyclic number.

It is not a de Polignac number, because 261732097 - 2¹⁵ = 261699329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (261732091) 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, 11896903 + ... + 11896924.

It is an arithmetic number, because the mean of its divisors is an integer number (71381484).

Almost surely, 2^261732097 is an apocalyptic number.

It is an amenable number.

261732097 is a deficient number, since it is larger than the sum of its proper divisors (23793839).

261732097 is a wasteful number, since it uses less digits than its factorization.

261732097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23793838.

The product of its (nonzero) digits is 31752, while the sum is 37.

The square root of 261732097 is about 16178.1363883483. The cubic root of 261732097 is about 639.6646167582.

The spelling of 261732097 in words is "two hundred sixty-one million, seven hundred thirty-two thousand, ninety-seven".