90258961 has 4 divisors (see below), whose sum is σ = 97201972. Its totient is φ = 83315952.

The previous prime is 90258937. The next prime is 90258977. The reversal of 90258961 is 16985209.

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 60217600 + 30041361 = 7760^2 + 5481^2 .

It is a cyclic number.

It is not a de Polignac number, because 90258961 - 2¹¹ = 90256913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90258061) 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, 3471486 + ... + 3471511.

It is an arithmetic number, because the mean of its divisors is an integer number (24300493).

Almost surely, 2^90258961 is an apocalyptic number.

It is an amenable number.

90258961 is a deficient number, since it is larger than the sum of its proper divisors (6943011).

90258961 is a wasteful number, since it uses less digits than its factorization.

90258961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6943010.

The product of its (nonzero) digits is 38880, while the sum is 40.

The square root of 90258961 is about 9500.4716198724. The cubic root of 90258961 is about 448.5698812368.

It can be divided in two parts, 90258 and 961, that added together give a palindrome (91219).

The spelling of 90258961 in words is "ninety million, two hundred fifty-eight thousand, nine hundred sixty-one".