90453557 has 4 divisors (see below), whose sum is σ = 90742860. Its totient is φ = 90164256.

The previous prime is 90453529. The next prime is 90453593. The reversal of 90453557 is 75535409.

It is a happy number.

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 37075921 + 53377636 = 6089^2 + 7306^2 .

It is a cyclic number.

It is not a de Polignac number, because 90453557 - 2¹⁰ = 90452533 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 90453557.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90453527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 144182 + ... + 144807.

It is an arithmetic number, because the mean of its divisors is an integer number (22685715).

Almost surely, 2^90453557 is an apocalyptic number.

It is an amenable number.

90453557 is a deficient number, since it is larger than the sum of its proper divisors (289303).

90453557 is a wasteful number, since it uses less digits than its factorization.

90453557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289302.

The product of its (nonzero) digits is 94500, while the sum is 38.

The square root of 90453557 is about 9510.7074920849. The cubic root of 90453557 is about 448.8920182194.

It can be divided in two parts, 90 and 453557, that multiplied together give a triangular number (40820130 = T₉₀₃₅).

The spelling of 90453557 in words is "ninety million, four hundred fifty-three thousand, five hundred fifty-seven".