99520577 has 4 divisors (see below), whose sum is σ = 107176020. Its totient is φ = 91865136.

The previous prime is 99520559. The next prime is 99520579. The reversal of 99520577 is 77502599.

It is a Cunningham number, because it is equal to 9976²+1.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14714896 + 84805681 = 3836^2 + 9209^2 .

It is a cyclic number.

It is not a de Polignac number, because 99520577 - 2⁸ = 99520321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99520579) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3827702 + ... + 3827727.

It is an arithmetic number, because the mean of its divisors is an integer number (26794005).

Almost surely, 2^99520577 is an apocalyptic number.

It is an amenable number.

99520577 is a deficient number, since it is larger than the sum of its proper divisors (7655443).

99520577 is a wasteful number, since it uses less digits than its factorization.

99520577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7655442.

The product of its (nonzero) digits is 198450, while the sum is 44.

The square root of 99520577 is about 9976.0000501203. Note that the first 4 decimals coincide. The cubic root of 99520577 is about 463.4159333211.

The spelling of 99520577 in words is "ninety-nine million, five hundred twenty thousand, five hundred seventy-seven".