23531379449 has 2 divisors, whose sum is σ = 23531379450. Its totient is φ = 23531379448.

The previous prime is 23531379437. The next prime is 23531379451. The reversal of 23531379449 is 94497313532.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20069822224 + 3461557225 = 141668^2 + 58835^2 .

It is a cyclic number.

It is not a de Polignac number, because 23531379449 - 2²⁴ = 23514602233 is a prime.

Together with 23531379451, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 23531379397 and 23531379406.

It is not a weakly prime, because it can be changed into another prime (23531379479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11765689724 + 11765689725.

It is an arithmetic number, because the mean of its divisors is an integer number (11765689725).

Almost surely, 2^23531379449 is an apocalyptic number.

It is an amenable number.

23531379449 is a deficient number, since it is larger than the sum of its proper divisors (1).

23531379449 is an equidigital number, since it uses as much as digits as its factorization.

23531379449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2449440, while the sum is 50.

The spelling of 23531379449 in words is "twenty-three billion, five hundred thirty-one million, three hundred seventy-nine thousand, four hundred forty-nine".