99620569 has 2 divisors, whose sum is σ = 99620570. Its totient is φ = 99620568.

The previous prime is 99620537. The next prime is 99620593. The reversal of 99620569 is 96502699.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 95160025 + 4460544 = 9755^2 + 2112^2 .

It is a cyclic number.

It is not a de Polignac number, because 99620569 - 2⁵ = 99620537 is a prime.

It is a super-2 number, since 2×99620569² = 19848515535767522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (99620069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49810284 + 49810285.

It is an arithmetic number, because the mean of its divisors is an integer number (49810285).

Almost surely, 2^99620569 is an apocalyptic number.

It is an amenable number.

99620569 is a deficient number, since it is larger than the sum of its proper divisors (1).

99620569 is an equidigital number, since it uses as much as digits as its factorization.

99620569 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 262440, while the sum is 46.

The square root of 99620569 is about 9981.0104197922. The cubic root of 99620569 is about 463.5710850727.

The spelling of 99620569 in words is "ninety-nine million, six hundred twenty thousand, five hundred sixty-nine".