90554501 has 4 divisors (see below), whose sum is σ = 93677100. Its totient is φ = 87431904.

The previous prime is 90554467. The next prime is 90554507. The reversal of 90554501 is 10545509.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10545509 = 13 ⋅811193.

It can be written as a sum of positive squares in 2 ways, for example, as 73530625 + 17023876 = 8575^2 + 4126^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90554501 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 3122569 = 90554501 / (9 + 0 + 5 + 5 + 4 + 5 + 0 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90554507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1561256 + ... + 1561313.

It is an arithmetic number, because the mean of its divisors is an integer number (23419275).

Almost surely, 2^90554501 is an apocalyptic number.

It is an amenable number.

90554501 is a deficient number, since it is larger than the sum of its proper divisors (3122599).

90554501 is a wasteful number, since it uses less digits than its factorization.

90554501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3122598.

The product of its (nonzero) digits is 4500, while the sum is 29.

The square root of 90554501 is about 9516.0128730472. The cubic root of 90554501 is about 449.0589403828.

The spelling of 90554501 in words is "ninety million, five hundred fifty-four thousand, five hundred one".