90333731 has 2 divisors, whose sum is σ = 90333732. Its totient is φ = 90333730.

The previous prime is 90333679. The next prime is 90333769. The reversal of 90333731 is 13733309.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 90333731 - 2¹⁴ = 90317347 is a prime.

It is a super-2 number, since 2×90333731² = 16320365912760722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 90333694 and 90333703.

It is not a weakly prime, because it can be changed into another prime (90333791) 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 as a sum of consecutive naturals, namely, 45166865 + 45166866.

It is an arithmetic number, because the mean of its divisors is an integer number (45166866).

Almost surely, 2^90333731 is an apocalyptic number.

90333731 is a deficient number, since it is larger than the sum of its proper divisors (1).

90333731 is an equidigital number, since it uses as much as digits as its factorization.

90333731 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5103, while the sum is 29.

The square root of 90333731 is about 9504.4058730675. The cubic root of 90333731 is about 448.6937112794.

The spelling of 90333731 in words is "ninety million, three hundred thirty-three thousand, seven hundred thirty-one".