90549973 has 8 divisors (see below), whose sum is σ = 96237720. Its totient is φ = 84902400.

The previous prime is 90549967. The next prime is 90549983. The reversal of 90549973 is 37994509.

It can be written as a sum of positive squares in 4 ways, for example, as 1096209 + 89453764 = 1047^2 + 9458^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 90549973 - 2⁵ = 90549941 is a prime.

It is a super-2 number, since 2×90549973² = 16398595220601458, 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 (90549913) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5328 + ... + 14473.

It is an arithmetic number, because the mean of its divisors is an integer number (12029715).

Almost surely, 2^90549973 is an apocalyptic number.

It is an amenable number.

90549973 is a deficient number, since it is larger than the sum of its proper divisors (5687747).

90549973 is a wasteful number, since it uses less digits than its factorization.

90549973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20087.

The product of its (nonzero) digits is 306180, while the sum is 46.

The square root of 90549973 is about 9515.7749553045. The cubic root of 90549973 is about 449.0514554879.

The spelling of 90549973 in words is "ninety million, five hundred forty-nine thousand, nine hundred seventy-three".