90259474 has 4 divisors (see below), whose sum is σ = 135389214. Its totient is φ = 45129736.

The previous prime is 90259471. The next prime is 90259483. The reversal of 90259474 is 47495209.

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

It can be written as a sum of positive squares in only one way, i.e., 87553449 + 2706025 = 9357^2 + 1645^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (90259471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22564867 + ... + 22564870.

Almost surely, 2^90259474 is an apocalyptic number.

90259474 is a deficient number, since it is larger than the sum of its proper divisors (45129740).

90259474 is a wasteful number, since it uses less digits than its factorization.

90259474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45129739.

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 90259474 is about 9500.4986184937. The cubic root of 90259474 is about 448.5707310727.

The spelling of 90259474 in words is "ninety million, two hundred fifty-nine thousand, four hundred seventy-four".