8790399491 has 8 divisors (see below), whose sum is σ = 9317389824. Its totient is φ = 8264510080.

The previous prime is 8790399487. The next prime is 8790399511. The reversal of 8790399491 is 1949930978.

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 8790399491 - 2² = 8790399487 is a prime.

It is a super-2 number, since 2×8790399491² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8790399491.

It is not an unprimeable number, because it can be changed into a prime (8790399421) 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, 258755 + ... + 290748.

It is an arithmetic number, because the mean of its divisors is an integer number (1164673728).

Almost surely, 2^8790399491 is an apocalyptic number.

8790399491 is a deficient number, since it is larger than the sum of its proper divisors (526990333).

8790399491 is a wasteful number, since it uses less digits than its factorization.

8790399491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 550461.

The product of its (nonzero) digits is 4408992, while the sum is 59.

The square root of 8790399491 is about 93757.1303475101. The cubic root of 8790399491 is about 2063.8091687383.

The spelling of 8790399491 in words is "eight billion, seven hundred ninety million, three hundred ninety-nine thousand, four hundred ninety-one".