916634881 has 4 divisors (see below), whose sum is σ = 917210452. Its totient is φ = 916059312.

The previous prime is 916634857. The next prime is 916634891. The reversal of 916634881 is 188436619.

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 484660225 + 431974656 = 22015^2 + 20784^2 .

It is a cyclic number.

It is not a de Polignac number, because 916634881 - 2²⁵ = 883080449 is a prime.

It is a super-2 number, since 2×916634881² = 1680439010131768322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (916634891) 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, 285390 + ... + 288583.

It is an arithmetic number, because the mean of its divisors is an integer number (229302613).

Almost surely, 2^916634881 is an apocalyptic number.

It is an amenable number.

916634881 is a deficient number, since it is larger than the sum of its proper divisors (575571).

916634881 is a wasteful number, since it uses less digits than its factorization.

916634881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 575570.

The product of its digits is 248832, while the sum is 46.

The square root of 916634881 is about 30275.9786134156. The cubic root of 916634881 is about 971.4015524111.

The spelling of 916634881 in words is "nine hundred sixteen million, six hundred thirty-four thousand, eight hundred eighty-one".