90898613 has 4 divisors (see below), whose sum is σ = 97890828. Its totient is φ = 83906400.

The previous prime is 90898607. The next prime is 90898649. The reversal of 90898613 is 31689809.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6589489 + 84309124 = 2567^2 + 9182^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90898613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90898663) 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, 3496088 + ... + 3496113.

It is an arithmetic number, because the mean of its divisors is an integer number (24472707).

Almost surely, 2^90898613 is an apocalyptic number.

It is an amenable number.

90898613 is a deficient number, since it is larger than the sum of its proper divisors (6992215).

90898613 is a wasteful number, since it uses less digits than its factorization.

90898613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6992214.

The product of its (nonzero) digits is 93312, while the sum is 44.

The square root of 90898613 is about 9534.0764104343. The cubic root of 90898613 is about 449.6270374740.

The spelling of 90898613 in words is "ninety million, eight hundred ninety-eight thousand, six hundred thirteen".