90190723 has 12 divisors (see below), whose sum is σ = 105118032. Its totient is φ = 77157360.

The previous prime is 90190717. The next prime is 90190733. The reversal of 90190723 is 32709109.

It is a de Polignac number, because none of the positive numbers 2^k-90190723 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90190703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29461 + ... + 32377.

It is an arithmetic number, because the mean of its divisors is an integer number (8759836).

Almost surely, 2^90190723 is an apocalyptic number.

90190723 is a deficient number, since it is larger than the sum of its proper divisors (14927309).

90190723 is a wasteful number, since it uses less digits than its factorization.

90190723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3562 (or 3555 counting only the distinct ones).

The product of its (nonzero) digits is 3402, while the sum is 31.

The square root of 90190723 is about 9496.8796454414. The cubic root of 90190723 is about 448.4568094402.

The spelling of 90190723 in words is "ninety million, one hundred ninety thousand, seven hundred twenty-three".