90459121 has 3 divisors (see below), whose sum is σ = 90468633. Its totient is φ = 90449610.

The previous prime is 90459119. The next prime is 90459139. The reversal of 90459121 is 12195409.

The square root of 90459121 is 9511.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 90459121 - 2¹ = 90459119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90459151) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 4756 + ... + 14266.

It is an arithmetic number, because the mean of its divisors is an integer number (30156211).

Almost surely, 2^90459121 is an apocalyptic number.

90459121 is the 9511-st square number.

90459121 is the 4756-th centered octagonal number.

It is an amenable number.

90459121 is a deficient number, since it is larger than the sum of its proper divisors (9512).

90459121 is an frugal number, since it uses more digits than its factorization.

90459121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19022 (or 9511 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 31.

The cubic root of 90459121 is about 448.9012221470.

It can be divided in two parts, 904 and 59121, that added together give a square (60025 = 245²).

The spelling of 90459121 in words is "ninety million, four hundred fifty-nine thousand, one hundred twenty-one".