90409292093 has 8 divisors (see below), whose sum is σ = 90929698680. Its totient is φ = 89890295040.

The previous prime is 90409292063. The next prime is 90409292117. The reversal of 90409292093 is 39029290409.

It can be written as a sum of positive squares in 4 ways, for example, as 58318869049 + 32090423044 = 241493^2 + 179138^2 .

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 90409292093 - 2⁸ = 90409291837 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 (90409292063) 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, 223598 + ... + 480431.

It is an arithmetic number, because the mean of its divisors is an integer number (11366212335).

Almost surely, 2^90409292093 is an apocalyptic number.

It is an amenable number.

90409292093 is a deficient number, since it is larger than the sum of its proper divisors (520406587).

90409292093 is a wasteful number, since it uses less digits than its factorization.

90409292093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 704767.

The product of its (nonzero) digits is 314928, while the sum is 47.

The spelling of 90409292093 in words is "ninety billion, four hundred nine million, two hundred ninety-two thousand, ninety-three".