99938569 has 2 divisors, whose sum is σ = 99938570. Its totient is φ = 99938568.

The previous prime is 99938551. The next prime is 99938599. The reversal of 99938569 is 96583999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70778569 + 29160000 = 8413^2 + 5400^2 .

It is a cyclic number.

It is not a de Polignac number, because 99938569 - 2⁷ = 99938441 is a prime.

It is a super-2 number, since 2×99938569² = 19975435147535522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (99938599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49969284 + 49969285.

It is an arithmetic number, because the mean of its divisors is an integer number (49969285).

Almost surely, 2^99938569 is an apocalyptic number.

It is an amenable number.

99938569 is a deficient number, since it is larger than the sum of its proper divisors (1).

99938569 is an equidigital number, since it uses as much as digits as its factorization.

99938569 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4723920, while the sum is 58.

The square root of 99938569 is about 9996.9279781341. The cubic root of 99938569 is about 464.0638180776.

The spelling of 99938569 in words is "ninety-nine million, nine hundred thirty-eight thousand, five hundred sixty-nine".