15137923 has 2 divisors, whose sum is σ = 15137924. Its totient is φ = 15137922.

The previous prime is 15137893. The next prime is 15137929. The reversal of 15137923 is 32973151.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 15137923 - 2⁵ = 15137891 is a prime.

It is not a weakly prime, because it can be changed into another prime (15137929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7568961 + 7568962.

It is an arithmetic number, because the mean of its divisors is an integer number (7568962).

Almost surely, 2^15137923 is an apocalyptic number.

15137923 is a deficient number, since it is larger than the sum of its proper divisors (1).

15137923 is an equidigital number, since it uses as much as digits as its factorization.

15137923 is an evil number, because the sum of its binary digits is even.

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

The square root of 15137923 is about 3890.7483855937. The cubic root of 15137923 is about 247.3747854875.

The spelling of 15137923 in words is "fifteen million, one hundred thirty-seven thousand, nine hundred twenty-three".