99090437 has 2 divisors, whose sum is σ = 99090438. Its totient is φ = 99090436.

The previous prime is 99090427. The next prime is 99090457. The reversal of 99090437 is 73409099.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 97436641 + 1653796 = 9871^2 + 1286^2 .

It is a cyclic number.

It is not a de Polignac number, because 99090437 - 2⁶ = 99090373 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 99090394 and 99090403.

It is a congruent number.

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, 49545218 + 49545219.

It is an arithmetic number, because the mean of its divisors is an integer number (49545219).

Almost surely, 2^99090437 is an apocalyptic number.

It is an amenable number.

99090437 is a deficient number, since it is larger than the sum of its proper divisors (1).

99090437 is an equidigital number, since it uses as much as digits as its factorization.

99090437 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 61236, while the sum is 41.

The square root of 99090437 is about 9954.4179638992. The cubic root of 99090437 is about 462.7473225049.

The spelling of 99090437 in words is "ninety-nine million, ninety thousand, four hundred thirty-seven".