99951287 has 2 divisors, whose sum is σ = 99951288. Its totient is φ = 99951286.

The previous prime is 99951283. The next prime is 99951301. The reversal of 99951287 is 78215999.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 99951287 - 2² = 99951283 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 (99951283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49975643 + 49975644.

It is an arithmetic number, because the mean of its divisors is an integer number (49975644).

Almost surely, 2^99951287 is an apocalyptic number.

99951287 is a deficient number, since it is larger than the sum of its proper divisors (1).

99951287 is an equidigital number, since it uses as much as digits as its factorization.

99951287 is an evil number, because the sum of its binary digits is even.

The product of its digits is 408240, while the sum is 50.

The square root of 99951287 is about 9997.5640533082. The cubic root of 99951287 is about 464.0835025476.

The spelling of 99951287 in words is "ninety-nine million, nine hundred fifty-one thousand, two hundred eighty-seven".