99989241257 has 2 divisors, whose sum is σ = 99989241258. Its totient is φ = 99989241256.

The previous prime is 99989241239. The next prime is 99989241367. The reversal of 99989241257 is 75214298999.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54242875801 + 45746365456 = 232901^2 + 213884^2 .

It is a cyclic number.

It is not a de Polignac number, because 99989241257 - 2¹⁶ = 99989175721 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 99989241193 and 99989241202.

It is not a weakly prime, because it can be changed into another prime (99989247257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49994620628 + 49994620629.

It is an arithmetic number, because the mean of its divisors is an integer number (49994620629).

Almost surely, 2^99989241257 is an apocalyptic number.

It is an amenable number.

99989241257 is a deficient number, since it is larger than the sum of its proper divisors (1).

99989241257 is an equidigital number, since it uses as much as digits as its factorization.

99989241257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 29393280, while the sum is 65.

The spelling of 99989241257 in words is "ninety-nine billion, nine hundred eighty-nine million, two hundred forty-one thousand, two hundred fifty-seven".