916859261 has 8 divisors (see below), whose sum is σ = 939939000. Its totient is φ = 893813760.

The previous prime is 916859239. The next prime is 916859263. The reversal of 916859261 is 162958619.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 97812100 + 819047161 = 9890^2 + 28619^2 .

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 916859261 - 2¹⁸ = 916597117 is a prime.

It is a super-2 number, since 2×916859261² = 1681261808962932242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (916859263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50765 + ... + 66413.

It is an arithmetic number, because the mean of its divisors is an integer number (117492375).

Almost surely, 2^916859261 is an apocalyptic number.

It is an amenable number.

916859261 is a deficient number, since it is larger than the sum of its proper divisors (23079739).

916859261 is a wasteful number, since it uses less digits than its factorization.

916859261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17119.

The product of its digits is 233280, while the sum is 47.

The square root of 916859261 is about 30279.6839646652. The cubic root of 916859261 is about 971.4808079949.

The spelling of 916859261 in words is "nine hundred sixteen million, eight hundred fifty-nine thousand, two hundred sixty-one".