916751861 has 4 divisors (see below), whose sum is σ = 917793324. Its totient is φ = 915710400.

The previous prime is 916751837. The next prime is 916751867. The reversal of 916751861 is 168157619.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 520980625 + 395771236 = 22825^2 + 19894^2 .

It is a cyclic number.

It is not a de Polignac number, because 916751861 - 2¹⁰ = 916750837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (916751867) 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, 519410 + ... + 521171.

It is an arithmetic number, because the mean of its divisors is an integer number (229448331).

Almost surely, 2^916751861 is an apocalyptic number.

It is an amenable number.

916751861 is a deficient number, since it is larger than the sum of its proper divisors (1041463).

916751861 is a wasteful number, since it uses less digits than its factorization.

916751861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1041462.

The product of its digits is 90720, while the sum is 44.

The square root of 916751861 is about 30277.9104463964. The cubic root of 916751861 is about 971.4428737421.

The spelling of 916751861 in words is "nine hundred sixteen million, seven hundred fifty-one thousand, eight hundred sixty-one".