23971513 has 8 divisors (see below), whose sum is σ = 25645032. Its totient is φ = 22327296.

The previous prime is 23971489. The next prime is 23971537. The reversal of 23971513 is 31517932.

It is an interprime number because it is at equal distance from previous prime (23971489) and next prime (23971537).

It can be written as a sum of positive squares in 4 ways, for example, as 3250809 + 20720704 = 1803^2 + 4552^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 23971513 - 2⁹ = 23971001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23971553) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5620 + ... + 8917.

It is an arithmetic number, because the mean of its divisors is an integer number (3205629).

Almost surely, 2^23971513 is an apocalyptic number.

It is an amenable number.

23971513 is a deficient number, since it is larger than the sum of its proper divisors (1673519).

23971513 is a wasteful number, since it uses less digits than its factorization.

23971513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14651.

The product of its digits is 5670, while the sum is 31.

The square root of 23971513 is about 4896.0711800381. The cubic root of 23971513 is about 288.3357428677.

The spelling of 23971513 in words is "twenty-three million, nine hundred seventy-one thousand, five hundred thirteen".