90407399 has 2 divisors, whose sum is σ = 90407400. Its totient is φ = 90407398.

The previous prime is 90407341. The next prime is 90407417. The reversal of 90407399 is 99370409.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 90407399 - 2⁸ = 90407143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90407599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45203699 + 45203700.

It is an arithmetic number, because the mean of its divisors is an integer number (45203700).

Almost surely, 2^90407399 is an apocalyptic number.

90407399 is a deficient number, since it is larger than the sum of its proper divisors (1).

90407399 is an equidigital number, since it uses as much as digits as its factorization.

90407399 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 90407399 is about 9508.2805490793. The cubic root of 90407399 is about 448.8156494401.

The spelling of 90407399 in words is "ninety million, four hundred seven thousand, three hundred ninety-nine".