99256687 has 2 divisors, whose sum is σ = 99256688. Its totient is φ = 99256686.

The previous prime is 99256667. The next prime is 99256691. The reversal of 99256687 is 78665299.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (78665299) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99256687 - 2²³ = 90868079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99256657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49628343 + 49628344.

It is an arithmetic number, because the mean of its divisors is an integer number (49628344).

Almost surely, 2^99256687 is an apocalyptic number.

99256687 is a deficient number, since it is larger than the sum of its proper divisors (1).

99256687 is an equidigital number, since it uses as much as digits as its factorization.

99256687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1632960, while the sum is 52.

The square root of 99256687 is about 9962.7650278424. The cubic root of 99256687 is about 463.0059709356.

The spelling of 99256687 in words is "ninety-nine million, two hundred fifty-six thousand, six hundred eighty-seven".