90840761 has 8 divisors (see below), whose sum is σ = 100293984. Its totient is φ = 81586720.

The previous prime is 90840749. The next prime is 90840779. The reversal of 90840761 is 16704809.

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 90840761 - 2⁶ = 90840697 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 (90845761) 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, 48836 + ... + 50661.

It is an arithmetic number, because the mean of its divisors is an integer number (12536748).

Almost surely, 2^90840761 is an apocalyptic number.

It is an amenable number.

90840761 is a deficient number, since it is larger than the sum of its proper divisors (9453223).

90840761 is a wasteful number, since it uses less digits than its factorization.

90840761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99591.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 90840761 is about 9531.0419682215. The cubic root of 90840761 is about 449.5316295507.

The spelling of 90840761 in words is "ninety million, eight hundred forty thousand, seven hundred sixty-one".