90933997 has 8 divisors (see below), whose sum is σ = 113372352. Its totient is φ = 70857600.

The previous prime is 90933979. The next prime is 90934007. The reversal of 90933997 is 79933909.

It is a happy number.

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

It is not a de Polignac number, because 90933997 - 2²³ = 82545389 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 90933997.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90933907) 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, 590404 + ... + 590557.

It is an arithmetic number, because the mean of its divisors is an integer number (14171544).

Almost surely, 2^90933997 is an apocalyptic number.

It is an amenable number.

90933997 is a deficient number, since it is larger than the sum of its proper divisors (22438355).

90933997 is a wasteful number, since it uses less digits than its factorization.

90933997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1180979.

The product of its (nonzero) digits is 413343, while the sum is 49.

The square root of 90933997 is about 9535.9318894380. The cubic root of 90933997 is about 449.6853718411.

The spelling of 90933997 in words is "ninety million, nine hundred thirty-three thousand, nine hundred ninety-seven".