90630493 has 4 divisors (see below), whose sum is σ = 90667548. Its totient is φ = 90593440.

The previous prime is 90630457. The next prime is 90630499. The reversal of 90630493 is 39403609.

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

It can be written as a sum of positive squares in 2 ways, for example, as 57198969 + 33431524 = 7563^2 + 5782^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90630493 is a prime.

It is a super-2 number, since 2×90630493² = 16427772522846098, 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 (90630499) 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, 14578 + ... + 19843.

It is an arithmetic number, because the mean of its divisors is an integer number (22666887).

Almost surely, 2^90630493 is an apocalyptic number.

It is an amenable number.

90630493 is a deficient number, since it is larger than the sum of its proper divisors (37055).

90630493 is a wasteful number, since it uses less digits than its factorization.

90630493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37054.

The product of its (nonzero) digits is 17496, while the sum is 34.

The square root of 90630493 is about 9520.0048844525. The cubic root of 90630493 is about 449.1845198051.

The spelling of 90630493 in words is "ninety million, six hundred thirty thousand, four hundred ninety-three".