90309163 has 8 divisors (see below), whose sum is σ = 103473632. Its totient is φ = 77210496.

The previous prime is 90309143. The next prime is 90309187. The reversal of 90309163 is 36190309.

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 90309163 - 2¹⁷ = 90178091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90309133) 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, 13470 + ... + 19027.

It is an arithmetic number, because the mean of its divisors is an integer number (12934204).

Almost surely, 2^90309163 is an apocalyptic number.

90309163 is a deficient number, since it is larger than the sum of its proper divisors (13164469).

90309163 is a wasteful number, since it uses less digits than its factorization.

90309163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32901.

The product of its (nonzero) digits is 4374, while the sum is 31.

The square root of 90309163 is about 9503.1133319560. The cubic root of 90309163 is about 448.6530306223.

The spelling of 90309163 in words is "ninety million, three hundred nine thousand, one hundred sixty-three".