90553905 has 48 divisors (see below), whose sum is σ = 177952320. Its totient is φ = 42228864.

The previous prime is 90553901. The next prime is 90553919. The reversal of 90553905 is 50935509.

It is not a de Polignac number, because 90553905 - 2² = 90553901 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 90553905.

It is not an unprimeable number, because it can be changed into a prime (90553901) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7042 + ... + 15188.

It is an arithmetic number, because the mean of its divisors is an integer number (3707340).

Almost surely, 2^90553905 is an apocalyptic number.

90553905 is a gapful number since it is divisible by the number (95) formed by its first and last digit.

It is an amenable number.

90553905 is a deficient number, since it is larger than the sum of its proper divisors (87398415).

90553905 is a wasteful number, since it uses less digits than its factorization.

90553905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8190 (or 8187 counting only the distinct ones).

The product of its (nonzero) digits is 30375, while the sum is 36.

The square root of 90553905 is about 9515.9815573592. The cubic root of 90553905 is about 449.0579551945.

The spelling of 90553905 in words is "ninety million, five hundred fifty-three thousand, nine hundred five".