90631117 has 4 divisors (see below), whose sum is σ = 91292796. Its totient is φ = 89969440.

The previous prime is 90631081. The next prime is 90631129. The reversal of 90631117 is 71113609.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 71113609 = 7 ⋅10159087.

It can be written as a sum of positive squares in 2 ways, for example, as 50041476 + 40589641 = 7074^2 + 6371^2 .

It is a cyclic number.

It is not a de Polignac number, because 90631117 - 2⁷ = 90630989 is a prime.

It is a super-3 number, since 3×90631117³ (a number of 25 digits) contains 333 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 (90631517) 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 3 ways as a sum of consecutive naturals, for example, 330634 + ... + 330907.

It is an arithmetic number, because the mean of its divisors is an integer number (22823199).

Almost surely, 2^90631117 is an apocalyptic number.

It is an amenable number.

90631117 is a deficient number, since it is larger than the sum of its proper divisors (661679).

90631117 is a wasteful number, since it uses less digits than its factorization.

90631117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 661678.

The product of its (nonzero) digits is 1134, while the sum is 28.

The square root of 90631117 is about 9520.0376574885. The cubic root of 90631117 is about 449.1855506961.

It can be divided in two parts, 906 and 31117, that added together give a palindrome (32023).

The spelling of 90631117 in words is "ninety million, six hundred thirty-one thousand, one hundred seventeen".