99077521 has 2 divisors, whose sum is σ = 99077522. Its totient is φ = 99077520.

The previous prime is 99077507. The next prime is 99077549. The reversal of 99077521 is 12577099.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 92852496 + 6225025 = 9636^2 + 2495^2 .

It is an emirp because it is prime and its reverse (12577099) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99077521 is a prime.

It is not a weakly prime, because it can be changed into another prime (99077221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49538760 + 49538761.

It is an arithmetic number, because the mean of its divisors is an integer number (49538761).

Almost surely, 2^99077521 is an apocalyptic number.

It is an amenable number.

99077521 is a deficient number, since it is larger than the sum of its proper divisors (1).

99077521 is an equidigital number, since it uses as much as digits as its factorization.

99077521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 39690, while the sum is 40.

The square root of 99077521 is about 9953.7691855899. The cubic root of 99077521 is about 462.7272159426.

The spelling of 99077521 in words is "ninety-nine million, seventy-seven thousand, five hundred twenty-one".