23145213997 has 2 divisors, whose sum is σ = 23145213998. Its totient is φ = 23145213996.

The previous prime is 23145213979. The next prime is 23145214007. The reversal of 23145213997 is 79931254132.

It is a happy number.

Together with previous prime (23145213979) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15726664836 + 7418549161 = 125406^2 + 86131^2 .

It is a cyclic number.

It is not a de Polignac number, because 23145213997 - 2¹⁵ = 23145181229 is a prime.

It is a super-3 number, since 3×23145213997³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23145210997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11572606998 + 11572606999.

It is an arithmetic number, because the mean of its divisors is an integer number (11572606999).

Almost surely, 2^23145213997 is an apocalyptic number.

It is an amenable number.

23145213997 is a deficient number, since it is larger than the sum of its proper divisors (1).

23145213997 is an equidigital number, since it uses as much as digits as its factorization.

23145213997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 408240, while the sum is 46.

The spelling of 23145213997 in words is "twenty-three billion, one hundred forty-five million, two hundred thirteen thousand, nine hundred ninety-seven".