99708551 has 2 divisors, whose sum is σ = 99708552. Its totient is φ = 99708550.

The previous prime is 99708533. The next prime is 99708559. The reversal of 99708551 is 15580799.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99708551 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99708559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49854275 + 49854276.

It is an arithmetic number, because the mean of its divisors is an integer number (49854276).

Almost surely, 2^99708551 is an apocalyptic number.

99708551 is a deficient number, since it is larger than the sum of its proper divisors (1).

99708551 is an equidigital number, since it uses as much as digits as its factorization.

99708551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 113400, while the sum is 44.

The square root of 99708551 is about 9985.4169166841. The cubic root of 99708551 is about 463.7075157668.

The spelling of 99708551 in words is "ninety-nine million, seven hundred eight thousand, five hundred fifty-one".