99975287 has 2 divisors, whose sum is σ = 99975288. Its totient is φ = 99975286.

The previous prime is 99975277. The next prime is 99975307. The reversal of 99975287 is 78257999.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 99975287 - 2²² = 95780983 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99975247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49987643 + 49987644.

It is an arithmetic number, because the mean of its divisors is an integer number (49987644).

Almost surely, 2^99975287 is an apocalyptic number.

99975287 is a deficient number, since it is larger than the sum of its proper divisors (1).

99975287 is an equidigital number, since it uses as much as digits as its factorization.

99975287 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2857680, while the sum is 56.

The square root of 99975287 is about 9998.7642736490. The cubic root of 99975287 is about 464.1206443495.

The spelling of 99975287 in words is "ninety-nine million, nine hundred seventy-five thousand, two hundred eighty-seven".