99983438957 has 2 divisors, whose sum is σ = 99983438958. Its totient is φ = 99983438956.

The previous prime is 99983438899. The next prime is 99983438963. The reversal of 99983438957 is 75983438999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67075302121 + 32908136836 = 258989^2 + 181406^2 .

It is a cyclic number.

It is not a de Polignac number, because 99983438957 - 2⁸ = 99983438701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99983432957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49991719478 + 49991719479.

It is an arithmetic number, because the mean of its divisors is an integer number (49991719479).

Almost surely, 2^99983438957 is an apocalyptic number.

It is an amenable number.

99983438957 is a deficient number, since it is larger than the sum of its proper divisors (1).

99983438957 is an equidigital number, since it uses as much as digits as its factorization.

99983438957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 529079040, while the sum is 74.

The spelling of 99983438957 in words is "ninety-nine billion, nine hundred eighty-three million, four hundred thirty-eight thousand, nine hundred fifty-seven".