90553731 has 8 divisors (see below), whose sum is σ = 122784960. Its totient is φ = 59345832.

The previous prime is 90553721. The next prime is 90553741. The reversal of 90553731 is 13735509.

It is an interprime number because it is at equal distance from previous prime (90553721) and next prime (90553741).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 90553731 - 2¹⁷ = 90422659 is a prime.

It is a super-2 number, since 2×90553731² = 16399956396040722, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 90553692 and 90553701.

It is not an unprimeable number, because it can be changed into a prime (90553711) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 255625 + ... + 255978.

It is an arithmetic number, because the mean of its divisors is an integer number (15348120).

Almost surely, 2^90553731 is an apocalyptic number.

90553731 is a deficient number, since it is larger than the sum of its proper divisors (32231229).

90553731 is a wasteful number, since it uses less digits than its factorization.

90553731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511665.

The product of its (nonzero) digits is 14175, while the sum is 33.

The square root of 90553731 is about 9515.9724148402. The cubic root of 90553731 is about 449.0576675716.

The spelling of 90553731 in words is "ninety million, five hundred fifty-three thousand, seven hundred thirty-one".