90420361 has 4 divisors (see below), whose sum is σ = 91902724. Its totient is φ = 88938000.

The previous prime is 90420329. The next prime is 90420371. The reversal of 90420361 is 16302409.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16302409 = 157 ⋅103837.

It can be written as a sum of positive squares in 2 ways, for example, as 40449600 + 49970761 = 6360^2 + 7069^2 .

It is not a de Polignac number, because 90420361 - 2⁵ = 90420329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90420311) 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, 741090 + ... + 741211.

It is an arithmetic number, because the mean of its divisors is an integer number (22975681).

Almost surely, 2^90420361 is an apocalyptic number.

It is an amenable number.

90420361 is a deficient number, since it is larger than the sum of its proper divisors (1482363).

90420361 is a wasteful number, since it uses less digits than its factorization.

90420361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1482362.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 90420361 is about 9508.9621410541. The cubic root of 90420361 is about 448.8370977968.

The spelling of 90420361 in words is "ninety million, four hundred twenty thousand, three hundred sixty-one".