90364748693 has 4 divisors (see below), whose sum is σ = 93480774540. Its totient is φ = 87248722848.

The previous prime is 90364748689. The next prime is 90364748699. The reversal of 90364748693 is 39684746309.

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 22927410724 + 67437337969 = 151418^2 + 259687^2 .

It is a cyclic number.

It is not a de Polignac number, because 90364748693 - 2² = 90364748689 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90364748699) 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, 1558012880 + ... + 1558012937.

It is an arithmetic number, because the mean of its divisors is an integer number (23370193635).

Almost surely, 2^90364748693 is an apocalyptic number.

It is an amenable number.

90364748693 is a deficient number, since it is larger than the sum of its proper divisors (3116025847).

90364748693 is a wasteful number, since it uses less digits than its factorization.

90364748693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3116025846.

The product of its (nonzero) digits is 23514624, while the sum is 59.

The spelling of 90364748693 in words is "ninety billion, three hundred sixty-four million, seven hundred forty-eight thousand, six hundred ninety-three".