23397761 has 4 divisors (see below), whose sum is σ = 23629524. Its totient is φ = 23166000.

The previous prime is 23397749. The next prime is 23397769. The reversal of 23397761 is 16779332.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17172736 + 6225025 = 4144^2 + 2495^2 .

It is a cyclic number.

It is not a de Polignac number, because 23397761 - 2¹⁴ = 23381377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23397769) 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, 115730 + ... + 115931.

It is an arithmetic number, because the mean of its divisors is an integer number (5907381).

Almost surely, 2^23397761 is an apocalyptic number.

It is an amenable number.

23397761 is a deficient number, since it is larger than the sum of its proper divisors (231763).

23397761 is a wasteful number, since it uses less digits than its factorization.

23397761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231762.

The product of its digits is 47628, while the sum is 38.

The square root of 23397761 is about 4837.1232153006. The cubic root of 23397761 is about 286.0167276310.

It can be divided in two parts, 23 and 397761, that multiplied together give a triangular number (9148503 = T₄₂₇₇).

The spelling of 23397761 in words is "twenty-three million, three hundred ninety-seven thousand, seven hundred sixty-one".