90743031 has 16 divisors (see below), whose sum is σ = 141510400. Its totient is φ = 57311064.

The previous prime is 90743021. The next prime is 90743039. The reversal of 90743031 is 13034709.

It is not a de Polignac number, because 90743031 - 2¹⁹ = 90218743 is a prime.

It is a super-2 number, since 2×90743031² = 16468595350133922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 90742986 and 90743004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90743039) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87931 + ... + 88956.

It is an arithmetic number, because the mean of its divisors is an integer number (8844400).

Almost surely, 2^90743031 is an apocalyptic number.

90743031 is a deficient number, since it is larger than the sum of its proper divisors (50767369).

90743031 is a wasteful number, since it uses less digits than its factorization.

90743031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176915 (or 176909 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 27.

The square root of 90743031 is about 9525.9136569675. The cubic root of 90743031 is about 449.3703638739.

The spelling of 90743031 in words is "ninety million, seven hundred forty-three thousand, thirty-one".