23978435927669 has 2 divisors, whose sum is σ = 23978435927670. Its totient is φ = 23978435927668.

The previous prime is 23978435927657. The next prime is 23978435927767. The reversal of 23978435927669 is 96672953487932.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23050849276900 + 927586650769 = 4801130^2 + 963113^2 .

It is a cyclic number.

It is not a de Polignac number, because 23978435927669 - 2³² = 23974140960373 is a prime.

It is a super-2 number, since 2×23978435927669² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 23978435927593 and 23978435927602.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23978435927269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11989217963834 + 11989217963835.

It is an arithmetic number, because the mean of its divisors is an integer number (11989217963835).

Almost surely, 2^{23978435927669} is an apocalyptic number.

It is an amenable number.

23978435927669 is a deficient number, since it is larger than the sum of its proper divisors (1).

23978435927669 is an equidigital number, since it uses as much as digits as its factorization.

23978435927669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7407106560, while the sum is 80.

The spelling of 23978435927669 in words is "twenty-three trillion, nine hundred seventy-eight billion, four hundred thirty-five million, nine hundred twenty-seven thousand, six hundred sixty-nine".