99890051 has 2 divisors, whose sum is σ = 99890052. Its totient is φ = 99890050.

The previous prime is 99890041. The next prime is 99890071. The reversal of 99890051 is 15009899.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 99890051 - 2¹⁴ = 99873667 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 99889990 and 99890008.

It is not a weakly prime, because it can be changed into another prime (99890041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49945025 + 49945026.

It is an arithmetic number, because the mean of its divisors is an integer number (49945026).

Almost surely, 2^99890051 is an apocalyptic number.

99890051 is a deficient number, since it is larger than the sum of its proper divisors (1).

99890051 is an equidigital number, since it uses as much as digits as its factorization.

99890051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 29160, while the sum is 41.

The square root of 99890051 is about 9994.5010380709. The cubic root of 99890051 is about 463.9887082939.

The spelling of 99890051 in words is "ninety-nine million, eight hundred ninety thousand, fifty-one".