90630818 has 4 divisors (see below), whose sum is σ = 135946230. Its totient is φ = 45315408.

The previous prime is 90630809. The next prime is 90630821. The reversal of 90630818 is 81803609.

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

It can be written as a sum of positive squares in only one way, i.e., 80048809 + 10582009 = 8947^2 + 3253^2 .

It is a super-3 number, since 3×90630818³ (a number of 25 digits) contains 333 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22657703 + ... + 22657706.

Almost surely, 2^90630818 is an apocalyptic number.

90630818 is a deficient number, since it is larger than the sum of its proper divisors (45315412).

90630818 is a wasteful number, since it uses less digits than its factorization.

90630818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45315411.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 90630818 is about 9520.0219537562. The cubic root of 90630818 is about 449.1850567281.

The spelling of 90630818 in words is "ninety million, six hundred thirty thousand, eight hundred eighteen".