90457919 has 4 divisors (see below), whose sum is σ = 94390896. Its totient is φ = 86524944.

The previous prime is 90457889. The next prime is 90457921. The reversal of 90457919 is 91975409.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90457919 is a prime.

It is a super-2 number, since 2×90457919² = 16365270219621122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 90457919.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90457979) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1966454 + ... + 1966499.

It is an arithmetic number, because the mean of its divisors is an integer number (23597724).

Almost surely, 2^90457919 is an apocalyptic number.

90457919 is a deficient number, since it is larger than the sum of its proper divisors (3932977).

90457919 is a wasteful number, since it uses less digits than its factorization.

90457919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3932976.

The product of its (nonzero) digits is 102060, while the sum is 44.

The square root of 90457919 is about 9510.9368097995. The cubic root of 90457919 is about 448.8992338395.

The spelling of 90457919 in words is "ninety million, four hundred fifty-seven thousand, nine hundred nineteen".