23139567 has 32 divisors (see below), whose sum is σ = 39605760. Its totient is φ = 13196160.

The previous prime is 23139563. The next prime is 23139607. The reversal of 23139567 is 76593132.

It is not a de Polignac number, because 23139567 - 2² = 23139563 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23139563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2758 + ... + 7340.

It is an arithmetic number, because the mean of its divisors is an integer number (1237680).

Almost surely, 2^23139567 is an apocalyptic number.

23139567 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

23139567 is a deficient number, since it is larger than the sum of its proper divisors (16466193).

23139567 is a wasteful number, since it uses less digits than its factorization.

23139567 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4620 (or 4614 counting only the distinct ones).

The product of its digits is 34020, while the sum is 36.

The square root of 23139567 is about 4810.3603815099. The cubic root of 23139567 is about 284.9607702236.

The spelling of 23139567 in words is "twenty-three million, one hundred thirty-nine thousand, five hundred sixty-seven".