99975769 has 2 divisors, whose sum is σ = 99975770. Its totient is φ = 99975768.

The previous prime is 99975761. The next prime is 99975773. The reversal of 99975769 is 96757999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70761744 + 29214025 = 8412^2 + 5405^2 .

It is a cyclic number.

It is not a de Polignac number, because 99975769 - 2³ = 99975761 is a prime.

It is a super-2 number, since 2×99975769² = 19990308774282722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (99975761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49987884 + 49987885.

It is an arithmetic number, because the mean of its divisors is an integer number (49987885).

Almost surely, 2^99975769 is an apocalyptic number.

It is an amenable number.

99975769 is a deficient number, since it is larger than the sum of its proper divisors (1).

99975769 is an equidigital number, since it uses as much as digits as its factorization.

99975769 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9644670, while the sum is 61.

The square root of 99975769 is about 9998.7883765984. The cubic root of 99975769 is about 464.1213902198.

The spelling of 99975769 in words is "ninety-nine million, nine hundred seventy-five thousand, seven hundred sixty-nine".