90424919 has 4 divisors (see below), whose sum is σ = 97380696. Its totient is φ = 83469144.

The previous prime is 90424907. The next prime is 90424927. The reversal of 90424919 is 91942409.

It is a happy number.

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-90424919 is a prime.

It is a super-2 number, since 2×90424919² = 16353331952313122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90424319) 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, 3477869 + ... + 3477894.

It is an arithmetic number, because the mean of its divisors is an integer number (24345174).

Almost surely, 2^90424919 is an apocalyptic number.

90424919 is a deficient number, since it is larger than the sum of its proper divisors (6955777).

90424919 is a wasteful number, since it uses less digits than its factorization.

90424919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6955776.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 90424919 is about 9509.2018066713. The cubic root of 90424919 is about 448.8446394799.

The spelling of 90424919 in words is "ninety million, four hundred twenty-four thousand, nine hundred nineteen".