90479999 has 8 divisors (see below), whose sum is σ = 94530912. Its totient is φ = 86438880.

The previous prime is 90479969. The next prime is 90480023. The reversal of 90479999 is 99997409.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90479999 is a prime.

It is a Duffinian number.

90479999 is a modest number, since divided by 9999 gives 9047 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90479929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21557 + ... + 25409.

It is an arithmetic number, because the mean of its divisors is an integer number (11816364).

Almost surely, 2^90479999 is an apocalyptic number.

90479999 is a deficient number, since it is larger than the sum of its proper divisors (4050913).

90479999 is a wasteful number, since it uses less digits than its factorization.

90479999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4897.

The product of its (nonzero) digits is 1653372, while the sum is 56.

The square root of 90479999 is about 9512.0975079107. The cubic root of 90479999 is about 448.9357550155.

The spelling of 90479999 in words is "ninety million, four hundred seventy-nine thousand, nine hundred ninety-nine".