23731139 has 2 divisors, whose sum is σ = 23731140. Its totient is φ = 23731138.

The previous prime is 23731129. The next prime is 23731159. The reversal of 23731139 is 93113732.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23731139 - 2¹² = 23727043 is a prime.

It is not a weakly prime, because it can be changed into another prime (23731129) 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 as a sum of consecutive naturals, namely, 11865569 + 11865570.

It is an arithmetic number, because the mean of its divisors is an integer number (11865570).

Almost surely, 2^23731139 is an apocalyptic number.

23731139 is a deficient number, since it is larger than the sum of its proper divisors (1).

23731139 is an equidigital number, since it uses as much as digits as its factorization.

23731139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3402, while the sum is 29.

The square root of 23731139 is about 4871.4616902938. The cubic root of 23731139 is about 287.3687426044.

The spelling of 23731139 in words is "twenty-three million, seven hundred thirty-one thousand, one hundred thirty-nine".