90249577 has 4 divisors (see below), whose sum is σ = 98454096. Its totient is φ = 82045060.

The previous prime is 90249557. The next prime is 90249637. The reversal of 90249577 is 77594209.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 90249577 - 2¹¹ = 90247529 is a prime.

It is a super-2 number, since 2×90249577² = 16289972297357858, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90249517) 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, 4102243 + ... + 4102264.

It is an arithmetic number, because the mean of its divisors is an integer number (24613524).

Almost surely, 2^90249577 is an apocalyptic number.

It is an amenable number.

90249577 is a deficient number, since it is larger than the sum of its proper divisors (8204519).

90249577 is a wasteful number, since it uses less digits than its factorization.

90249577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8204518.

The product of its (nonzero) digits is 158760, while the sum is 43.

The square root of 90249577 is about 9499.9777368160. The cubic root of 90249577 is about 448.5543351326.

The spelling of 90249577 in words is "ninety million, two hundred forty-nine thousand, five hundred seventy-seven".