23731698989 has 2 divisors, whose sum is σ = 23731698990. Its totient is φ = 23731698988.

The previous prime is 23731698973. The next prime is 23731699037. The reversal of 23731698989 is 98989613732.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20633886025 + 3097812964 = 143645^2 + 55658^2 .

It is a cyclic number.

It is not a de Polignac number, because 23731698989 - 2⁴ = 23731698973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23731698929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11865849494 + 11865849495.

It is an arithmetic number, because the mean of its divisors is an integer number (11865849495).

Almost surely, 2^23731698989 is an apocalyptic number.

It is an amenable number.

23731698989 is a deficient number, since it is larger than the sum of its proper divisors (1).

23731698989 is an equidigital number, since it uses as much as digits as its factorization.

23731698989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 35271936, while the sum is 65.

The spelling of 23731698989 in words is "twenty-three billion, seven hundred thirty-one million, six hundred ninety-eight thousand, nine hundred eighty-nine".