90490394297 has 8 divisors (see below), whose sum is σ = 90593925576. Its totient is φ = 90386917632.

The previous prime is 90490394279. The next prime is 90490394317. The reversal of 90490394297 is 79249309409.

It can be written as a sum of positive squares in 4 ways, for example, as 62818404496 + 27671989801 = 250636^2 + 166349^2 .

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 90490394297 - 2⁸ = 90490394041 is a prime.

It is a super-2 number, since 2×90490394297² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90490394207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3927503 + ... + 3950475.

It is an arithmetic number, because the mean of its divisors is an integer number (11324240697).

Almost surely, 2^90490394297 is an apocalyptic number.

It is an amenable number.

90490394297 is a deficient number, since it is larger than the sum of its proper divisors (103531279).

90490394297 is a wasteful number, since it uses less digits than its factorization.

90490394297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27307.

The product of its (nonzero) digits is 4408992, while the sum is 56.

The spelling of 90490394297 in words is "ninety billion, four hundred ninety million, three hundred ninety-four thousand, two hundred ninety-seven".