90693839609 has 4 divisors (see below), whose sum is σ = 90694516560. Its totient is φ = 90693162660.

The previous prime is 90693839581. The next prime is 90693839647.

It is a happy number.

90693839609 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90693839609 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 (90693839669) 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, 62519 + ... + 430460.

It is an arithmetic number, because the mean of its divisors is an integer number (22673629140).

Almost surely, 2^90693839609 is an apocalyptic number.

It is an amenable number.

90693839609 is a deficient number, since it is larger than the sum of its proper divisors (676951).

90693839609 is a wasteful number, since it uses less digits than its factorization.

90693839609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 676950.

The product of its (nonzero) digits is 17006112, while the sum is 62.

The spelling of 90693839609 in words is "ninety billion, six hundred ninety-three million, eight hundred thirty-nine thousand, six hundred nine".