99090689 has 2 divisors, whose sum is σ = 99090690. Its totient is φ = 99090688.

The previous prime is 99090679. The next prime is 99090763. The reversal of 99090689 is 98609099.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 84953089 + 14137600 = 9217^2 + 3760^2 .

It is a cyclic number.

It is not a de Polignac number, because 99090689 - 2¹² = 99086593 is a prime.

It is not a weakly prime, because it can be changed into another prime (99090659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49545344 + 49545345.

It is an arithmetic number, because the mean of its divisors is an integer number (49545345).

Almost surely, 2^99090689 is an apocalyptic number.

It is an amenable number.

99090689 is a deficient number, since it is larger than the sum of its proper divisors (1).

99090689 is an equidigital number, since it uses as much as digits as its factorization.

99090689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 314928, while the sum is 50.

The square root of 99090689 is about 9954.4306215876. The cubic root of 99090689 is about 462.7477147803.

The spelling of 99090689 in words is "ninety-nine million, ninety thousand, six hundred eighty-nine".