99955567 has 2 divisors, whose sum is σ = 99955568. Its totient is φ = 99955566.

The previous prime is 99955519. The next prime is 99955571. The reversal of 99955567 is 76555999.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99955567 is a prime.

It is a super-2 number, since 2×99955567² = 19982230748582978, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99955577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49977783 + 49977784.

It is an arithmetic number, because the mean of its divisors is an integer number (49977784).

Almost surely, 2^99955567 is an apocalyptic number.

99955567 is a deficient number, since it is larger than the sum of its proper divisors (1).

99955567 is an equidigital number, since it uses as much as digits as its factorization.

99955567 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3827250, while the sum is 55.

The square root of 99955567 is about 9997.7781031587. The cubic root of 99955567 is about 464.0901266045.

The spelling of 99955567 in words is "ninety-nine million, nine hundred fifty-five thousand, five hundred sixty-seven".