23109631 has 2 divisors, whose sum is σ = 23109632. Its totient is φ = 23109630.

The previous prime is 23109587. The next prime is 23109637. The reversal of 23109631 is 13690132.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23109631 - 2¹³ = 23101439 is a prime.

It is a super-2 number, since 2×23109631² = 1068110089912322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 23109596 and 23109605.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23109637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11554815 + 11554816.

It is an arithmetic number, because the mean of its divisors is an integer number (11554816).

Almost surely, 2^23109631 is an apocalyptic number.

23109631 is a deficient number, since it is larger than the sum of its proper divisors (1).

23109631 is an equidigital number, since it uses as much as digits as its factorization.

23109631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 972, while the sum is 25.

The square root of 23109631 is about 4807.2477572931. The cubic root of 23109631 is about 284.8378312049.

Adding to 23109631 its reverse (13690132), we get a palindrome (36799763).

The spelling of 23109631 in words is "twenty-three million, one hundred nine thousand, six hundred thirty-one".