23898989897 has 2 divisors, whose sum is σ = 23898989898. Its totient is φ = 23898989896.

The previous prime is 23898989857. The next prime is 23898989923. The reversal of 23898989897 is 79898989832.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12204946576 + 11694043321 = 110476^2 + 108139^2 .

It is a cyclic number.

It is not a de Polignac number, because 23898989897 - 2⁸ = 23898989641 is a prime.

It is not a weakly prime, because it can be changed into another prime (23898989857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11949494948 + 11949494949.

It is an arithmetic number, because the mean of its divisors is an integer number (11949494949).

Almost surely, 2^23898989897 is an apocalyptic number.

It is an amenable number.

23898989897 is a deficient number, since it is larger than the sum of its proper divisors (1).

23898989897 is an equidigital number, since it uses as much as digits as its factorization.

23898989897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1128701952, while the sum is 80.

The spelling of 23898989897 in words is "twenty-three billion, eight hundred ninety-eight million, nine hundred eighty-nine thousand, eight hundred ninety-seven".