916388771 has 8 divisors (see below), whose sum is σ = 922795200. Its totient is φ = 909992232.

The previous prime is 916388743. The next prime is 916388773. The reversal of 916388771 is 177883619.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-916388771 is a prime.

It is a super-2 number, since 2×916388771² = 1679536759229780882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (916388773) 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, 338180 + ... + 340878.

It is an arithmetic number, because the mean of its divisors is an integer number (115349400).

Almost surely, 2^916388771 is an apocalyptic number.

916388771 is a deficient number, since it is larger than the sum of its proper divisors (6406429).

916388771 is a wasteful number, since it uses less digits than its factorization.

916388771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4945.

The product of its digits is 508032, while the sum is 50.

The square root of 916388771 is about 30271.9138972084. The cubic root of 916388771 is about 971.3146064742.

The spelling of 916388771 in words is "nine hundred sixteen million, three hundred eighty-eight thousand, seven hundred seventy-one".