99090457 has 2 divisors, whose sum is σ = 99090458. Its totient is φ = 99090456.

The previous prime is 99090437. The next prime is 99090461. The reversal of 99090457 is 75409099.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 88566921 + 10523536 = 9411^2 + 3244^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99090457 is a prime.

It is not a weakly prime, because it can be changed into another prime (99090427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49545228 + 49545229.

It is an arithmetic number, because the mean of its divisors is an integer number (49545229).

Almost surely, 2^99090457 is an apocalyptic number.

It is an amenable number.

99090457 is a deficient number, since it is larger than the sum of its proper divisors (1).

99090457 is an equidigital number, since it uses as much as digits as its factorization.

99090457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 102060, while the sum is 43.

The square root of 99090457 is about 9954.4189684783. The cubic root of 99090457 is about 462.7473536379.

The spelling of 99090457 in words is "ninety-nine million, ninety thousand, four hundred fifty-seven".