90748931 has 24 divisors (see below), whose sum is σ = 114816240. Its totient is φ = 71088192.

The previous prime is 90748927. The next prime is 90748943. The reversal of 90748931 is 13984709.

It is a happy number.

It is not a de Polignac number, because 90748931 - 2² = 90748927 is a prime.

It is a super-2 number, since 2×90748931² = 16470736955285522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (90748951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 68780 + ... + 70086.

It is an arithmetic number, because the mean of its divisors is an integer number (4784010).

Almost surely, 2^90748931 is an apocalyptic number.

90748931 is a gapful number since it is divisible by the number (91) formed by its first and last digit.

90748931 is a deficient number, since it is larger than the sum of its proper divisors (24067309).

90748931 is a wasteful number, since it uses less digits than its factorization.

90748931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1443 (or 1436 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 90748931 is about 9526.2233335147. The cubic root of 90748931 is about 449.3801028318.

The spelling of 90748931 in words is "ninety million, seven hundred forty-eight thousand, nine hundred thirty-one".