23432539 has 4 divisors (see below), whose sum is σ = 25235056. Its totient is φ = 21630024.

The previous prime is 23432537. The next prime is 23432569. The reversal of 23432539 is 93523432.

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

It is not a de Polignac number, because 23432539 - 2¹ = 23432537 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23432539.

It is not an unprimeable number, because it can be changed into a prime (23432537) 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, 901239 + ... + 901264.

It is an arithmetic number, because the mean of its divisors is an integer number (6308764).

Almost surely, 2^23432539 is an apocalyptic number.

23432539 is a deficient number, since it is larger than the sum of its proper divisors (1802517).

23432539 is a wasteful number, since it uses less digits than its factorization.

23432539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1802516.

The product of its digits is 19440, while the sum is 31.

The square root of 23432539 is about 4840.7167857663. The cubic root of 23432539 is about 286.1583674718.

The spelling of 23432539 in words is "twenty-three million, four hundred thirty-two thousand, five hundred thirty-nine".