90904507 has 2 divisors, whose sum is σ = 90904508. Its totient is φ = 90904506.

The previous prime is 90904501. The next prime is 90904519. The reversal of 90904507 is 70540909.

It is a weak prime.

It is an emirp because it is prime and its reverse (70540909) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90904507 - 2¹¹ = 90902459 is a prime.

It is not a weakly prime, because it can be changed into another prime (90904501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45452253 + 45452254.

It is an arithmetic number, because the mean of its divisors is an integer number (45452254).

Almost surely, 2^90904507 is an apocalyptic number.

90904507 is a deficient number, since it is larger than the sum of its proper divisors (1).

90904507 is an equidigital number, since it uses as much as digits as its factorization.

90904507 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11340, while the sum is 34.

The square root of 90904507 is about 9534.3855072050. The cubic root of 90904507 is about 449.6367554239.

The spelling of 90904507 in words is "ninety million, nine hundred four thousand, five hundred seven".