90331497 has 8 divisors (see below), whose sum is σ = 133824480. Its totient is φ = 60220980.

The previous prime is 90331481. The next prime is 90331517. The reversal of 90331497 is 79413309.

It is not a de Polignac number, because 90331497 - 2⁴ = 90331481 is a prime.

It is a super-2 number, since 2×90331497² = 16319558700522018, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (90331447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1672779 + ... + 1672832.

It is an arithmetic number, because the mean of its divisors is an integer number (16728060).

Almost surely, 2^90331497 is an apocalyptic number.

It is an amenable number.

90331497 is a deficient number, since it is larger than the sum of its proper divisors (43492983).

90331497 is a wasteful number, since it uses less digits than its factorization.

90331497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3345620 (or 3345614 counting only the distinct ones).

The product of its (nonzero) digits is 20412, while the sum is 36.

The square root of 90331497 is about 9504.2883478985. The cubic root of 90331497 is about 448.6900124395.

It can be divided in two parts, 903 and 31497, that added together give a square (32400 = 180²).

The spelling of 90331497 in words is "ninety million, three hundred thirty-one thousand, four hundred ninety-seven".