90309377 has 4 divisors (see below), whose sum is σ = 90329556. Its totient is φ = 90289200.

The previous prime is 90309371. The next prime is 90309397. The reversal of 90309377 is 77390309.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 77390309 = 2081 ⋅37189.

It can be written as a sum of positive squares in 2 ways, for example, as 49336576 + 40972801 = 7024^2 + 6401^2 .

It is a cyclic number.

It is not a de Polignac number, because 90309377 - 2²⁴ = 73532161 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 90309377.

It is not an unprimeable number, because it can be changed into a prime (90309371) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38 + ... + 13439.

It is an arithmetic number, because the mean of its divisors is an integer number (22582389).

Almost surely, 2^90309377 is an apocalyptic number.

It is an amenable number.

90309377 is a deficient number, since it is larger than the sum of its proper divisors (20179).

90309377 is a wasteful number, since it uses less digits than its factorization.

90309377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20178.

The product of its (nonzero) digits is 35721, while the sum is 38.

The square root of 90309377 is about 9503.1245914173. The cubic root of 90309377 is about 448.6533850038.

The spelling of 90309377 in words is "ninety million, three hundred nine thousand, three hundred seventy-seven".