90917542 has 4 divisors (see below), whose sum is σ = 136376316. Its totient is φ = 45458770.

The previous prime is 90917539. The next prime is 90917549. The reversal of 90917542 is 24571909.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24571909 = 137 ⋅179357.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90917549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22729384 + ... + 22729387.

It is an arithmetic number, because the mean of its divisors is an integer number (34094079).

Almost surely, 2^90917542 is an apocalyptic number.

90917542 is a deficient number, since it is larger than the sum of its proper divisors (45458774).

90917542 is a wasteful number, since it uses less digits than its factorization.

90917542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45458773.

The product of its (nonzero) digits is 22680, while the sum is 37.

The square root of 90917542 is about 9535.0690611028. The cubic root of 90917542 is about 449.6582458691.

The spelling of 90917542 in words is "ninety million, nine hundred seventeen thousand, five hundred forty-two".