90954551 has 4 divisors (see below), whose sum is σ = 91014672. Its totient is φ = 90894432.

The previous prime is 90954533. The next prime is 90954553. The reversal of 90954551 is 15545909.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15545909 = 181 ⋅85889.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90954551 is a prime.

It is a super-2 number, since 2×90954551² = 16545460695223202, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90954553) 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, 27731 + ... + 30836.

It is an arithmetic number, because the mean of its divisors is an integer number (22753668).

Almost surely, 2^90954551 is an apocalyptic number.

90954551 is a deficient number, since it is larger than the sum of its proper divisors (60121).

90954551 is a wasteful number, since it uses less digits than its factorization.

90954551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60120.

The product of its (nonzero) digits is 40500, while the sum is 38.

The square root of 90954551 is about 9537.0095417799. The cubic root of 90954551 is about 449.7192503945.

The spelling of 90954551 in words is "ninety million, nine hundred fifty-four thousand, five hundred fifty-one".