916311761 has 4 divisors (see below), whose sum is σ = 925758372. Its totient is φ = 906865152.

The previous prime is 916311749. The next prime is 916311821. The reversal of 916311761 is 167113619.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 167113619 = 263 ⋅635413.

It can be written as a sum of positive squares in 2 ways, for example, as 632220736 + 284091025 = 25144^2 + 16855^2 .

It is a cyclic number.

It is not a de Polignac number, because 916311761 - 2²² = 912117457 is a prime.

It is a super-2 number, since 2×916311761² = 1679254486693842242, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (916311061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4723160 + ... + 4723353.

It is an arithmetic number, because the mean of its divisors is an integer number (231439593).

Almost surely, 2^916311761 is an apocalyptic number.

It is an amenable number.

916311761 is a deficient number, since it is larger than the sum of its proper divisors (9446611).

916311761 is an equidigital number, since it uses as much as digits as its factorization.

916311761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9446610.

The product of its digits is 6804, while the sum is 35.

The square root of 916311761 is about 30270.6418993717. The cubic root of 916311761 is about 971.2873971224.

The spelling of 916311761 in words is "nine hundred sixteen million, three hundred eleven thousand, seven hundred sixty-one".