23929543949 has 2 divisors, whose sum is σ = 23929543950. Its totient is φ = 23929543948.

The previous prime is 23929543871. The next prime is 23929543973. The reversal of 23929543949 is 94934592932.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23508555625 + 420988324 = 153325^2 + 20518^2 .

It is a cyclic number.

It is not a de Polignac number, because 23929543949 - 2¹² = 23929539853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23929543049) 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, 11964771974 + 11964771975.

It is an arithmetic number, because the mean of its divisors is an integer number (11964771975).

Almost surely, 2^23929543949 is an apocalyptic number.

It is an amenable number.

23929543949 is a deficient number, since it is larger than the sum of its proper divisors (1).

23929543949 is an equidigital number, since it uses as much as digits as its factorization.

23929543949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18895680, while the sum is 59.

The spelling of 23929543949 in words is "twenty-three billion, nine hundred twenty-nine million, five hundred forty-three thousand, nine hundred forty-nine".