23137819 has 2 divisors, whose sum is σ = 23137820. Its totient is φ = 23137818.

The previous prime is 23137781. The next prime is 23137823. The reversal of 23137819 is 91873132.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23137819 - 2¹¹ = 23135771 is a prime.

It is a super-2 number, since 2×23137819² = 1070717336153522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (23137859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11568909 + 11568910.

It is an arithmetic number, because the mean of its divisors is an integer number (11568910).

Almost surely, 2^23137819 is an apocalyptic number.

23137819 is a deficient number, since it is larger than the sum of its proper divisors (1).

23137819 is an equidigital number, since it uses as much as digits as its factorization.

23137819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9072, while the sum is 34.

The square root of 23137819 is about 4810.1786869097. The cubic root of 23137819 is about 284.9535945784.

The spelling of 23137819 in words is "twenty-three million, one hundred thirty-seven thousand, eight hundred nineteen".