90803731 has 4 divisors (see below), whose sum is σ = 91652472. Its totient is φ = 89954992.

The previous prime is 90803723. The next prime is 90803753. The reversal of 90803731 is 13730809.

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

It is a cyclic number.

It is not a de Polignac number, because 90803731 - 2³ = 90803723 is a prime.

It is a super-2 number, since 2×90803731² = 16490635127040722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 90803693 and 90803702.

It is not an unprimeable number, because it can be changed into a prime (90803761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 424210 + ... + 424423.

It is an arithmetic number, because the mean of its divisors is an integer number (22913118).

Almost surely, 2^90803731 is an apocalyptic number.

90803731 is a deficient number, since it is larger than the sum of its proper divisors (848741).

90803731 is a wasteful number, since it uses less digits than its factorization.

90803731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 848740.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 90803731 is about 9529.0991704358. The cubic root of 90803731 is about 449.4705394320.

The spelling of 90803731 in words is "ninety million, eight hundred three thousand, seven hundred thirty-one".