90749898 has 12 divisors (see below), whose sum is σ = 196624818. Its totient is φ = 30249960.

The previous prime is 90749891. The next prime is 90749899. The reversal of 90749898 is 89894709.

It can be written as a sum of positive squares in only one way, i.e., 88115769 + 2634129 = 9387^2 + 1623^2 .

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (90749891) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2520813 + ... + 2520848.

Almost surely, 2^90749898 is an apocalyptic number.

90749898 is an abundant number, since it is smaller than the sum of its proper divisors (105874920).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

90749898 is a wasteful number, since it uses less digits than its factorization.

90749898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5041669 (or 5041666 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 54.

The square root of 90749898 is about 9526.2740880157. The cubic root of 90749898 is about 449.3816989903.

It can be divided in two parts, 907 and 49898, that added together give a palindrome (50805).

The spelling of 90749898 in words is "ninety million, seven hundred forty-nine thousand, eight hundred ninety-eight".