23487839 has 4 divisors (see below), whose sum is σ = 23497656. Its totient is φ = 23478024.

The previous prime is 23487809. The next prime is 23487869. The reversal of 23487839 is 93878432.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (23487809) and next prime (23487869).

It is a cyclic number.

It is not a de Polignac number, because 23487839 - 2¹² = 23483743 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 23487839.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23487809) 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, 1292 + ... + 6974.

It is an arithmetic number, because the mean of its divisors is an integer number (5874414).

Almost surely, 2^23487839 is an apocalyptic number.

23487839 is a deficient number, since it is larger than the sum of its proper divisors (9817).

23487839 is an equidigital number, since it uses as much as digits as its factorization.

23487839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9816.

The product of its digits is 290304, while the sum is 44.

The square root of 23487839 is about 4846.4253837236. The cubic root of 23487839 is about 286.3832986461.

Multiplying 23487839 by its sum of digits (44), we get a triangular number (1033464916 = T₄₅₄₆₃).

The spelling of 23487839 in words is "twenty-three million, four hundred eighty-seven thousand, eight hundred thirty-nine".