90454551 has 8 divisors (see below), whose sum is σ = 131570304. Its totient is φ = 54820920.

The previous prime is 90454547. The next prime is 90454571. The reversal of 90454551 is 15545409.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 90454551 - 2² = 90454547 is a prime.

It is a super-2 number, since 2×90454551² = 16364051593223202, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 2741047 = 90454551 / (9 + 0 + 4 + 5 + 4 + 5 + 5 + 1).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90454531) 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 7 ways as a sum of consecutive naturals, for example, 1370491 + ... + 1370556.

It is an arithmetic number, because the mean of its divisors is an integer number (16446288).

Almost surely, 2^90454551 is an apocalyptic number.

90454551 is a deficient number, since it is larger than the sum of its proper divisors (41115753).

90454551 is a wasteful number, since it uses less digits than its factorization.

90454551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2741061.

The product of its (nonzero) digits is 18000, while the sum is 33.

The square root of 90454551 is about 9510.7597488318. The cubic root of 90454551 is about 448.8936625145.

It can be divided in two parts, 904 and 54551, that added together give a palindrome (55455).

The spelling of 90454551 in words is "ninety million, four hundred fifty-four thousand, five hundred fifty-one".