99919577 has 2 divisors, whose sum is σ = 99919578. Its totient is φ = 99919576.

The previous prime is 99919571. The next prime is 99919601. The reversal of 99919577 is 77591999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 95335696 + 4583881 = 9764^2 + 2141^2 .

It is a cyclic number.

It is not a de Polignac number, because 99919577 - 2²⁰ = 98871001 is a prime.

It is not a weakly prime, because it can be changed into another prime (99919571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49959788 + 49959789.

It is an arithmetic number, because the mean of its divisors is an integer number (49959789).

Almost surely, 2^99919577 is an apocalyptic number.

It is an amenable number.

99919577 is a deficient number, since it is larger than the sum of its proper divisors (1).

99919577 is an equidigital number, since it uses as much as digits as its factorization.

99919577 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1607445, while the sum is 56.

The square root of 99919577 is about 9995.9780411924. The cubic root of 99919577 is about 464.0344198233.

The spelling of 99919577 in words is "ninety-nine million, nine hundred nineteen thousand, five hundred seventy-seven".