90997673 has 4 divisors (see below), whose sum is σ = 97997508. Its totient is φ = 83997840.

The previous prime is 90997663. The next prime is 90997681. The reversal of 90997673 is 37679909.

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 22306729 + 68690944 = 4723^2 + 8288^2 .

It is a cyclic number.

It is not a de Polignac number, because 90997673 - 2¹⁰ = 90996649 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (90997663) 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, 3499898 + ... + 3499923.

It is an arithmetic number, because the mean of its divisors is an integer number (24499377).

Almost surely, 2^90997673 is an apocalyptic number.

It is an amenable number.

90997673 is a deficient number, since it is larger than the sum of its proper divisors (6999835).

90997673 is a wasteful number, since it uses less digits than its factorization.

90997673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6999834.

The product of its (nonzero) digits is 642978, while the sum is 50.

The square root of 90997673 is about 9539.2700454490. The cubic root of 90997673 is about 449.7903105352.

The spelling of 90997673 in words is "ninety million, nine hundred ninety-seven thousand, six hundred seventy-three".