90402793 has 8 divisors (see below), whose sum is σ = 98953736. Its totient is φ = 82080000.

The previous prime is 90402769. The next prime is 90402797. The reversal of 90402793 is 39720409.

It can be written as a sum of positive squares in 4 ways, for example, as 729 + 90402064 = 27^2 + 9508^2 .

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 90402793 - 2⁹ = 90402281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90402797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56208 + ... + 57793.

It is an arithmetic number, because the mean of its divisors is an integer number (12369217).

Almost surely, 2^90402793 is an apocalyptic number.

It is an amenable number.

90402793 is a deficient number, since it is larger than the sum of its proper divisors (8550943).

90402793 is a wasteful number, since it uses less digits than its factorization.

90402793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114075.

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 90402793 is about 9508.0383360607. The cubic root of 90402793 is about 448.8080273501.

The spelling of 90402793 in words is "ninety million, four hundred two thousand, seven hundred ninety-three".