90434657 has 8 divisors (see below), whose sum is σ = 94747392. Its totient is φ = 86209200.

The previous prime is 90434653. The next prime is 90434681. The reversal of 90434657 is 75643409.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 90434657 - 2² = 90434653 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 90434657.

It is not an unprimeable number, because it can be changed into a prime (90434653) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19694 + ... + 23847.

It is an arithmetic number, because the mean of its divisors is an integer number (11843424).

Almost surely, 2^90434657 is an apocalyptic number.

It is an amenable number.

90434657 is a deficient number, since it is larger than the sum of its proper divisors (4312735).

90434657 is a wasteful number, since it uses less digits than its factorization.

90434657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43639.

The product of its (nonzero) digits is 90720, while the sum is 38.

The square root of 90434657 is about 9509.7138232441. The cubic root of 90434657 is about 448.8607511604.

The spelling of 90434657 in words is "ninety million, four hundred thirty-four thousand, six hundred fifty-seven".