917144641 has 16 divisors (see below), whose sum is σ = 1111229440. Its totient is φ = 740197440.

The previous prime is 917144629. The next prime is 917144663. The reversal of 917144641 is 146441719.

It is a cyclic number.

It is not a de Polignac number, because 917144641 - 2⁷ = 917144513 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 917144641.

It is not an unprimeable number, because it can be changed into a prime (917144671) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49086 + ... + 65143.

It is an arithmetic number, because the mean of its divisors is an integer number (69451840).

Almost surely, 2^917144641 is an apocalyptic number.

It is an amenable number.

917144641 is a deficient number, since it is larger than the sum of its proper divisors (194084799).

917144641 is a wasteful number, since it uses less digits than its factorization.

917144641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114304.

The product of its digits is 24192, while the sum is 37.

The square root of 917144641 is about 30284.3959985997. The cubic root of 917144641 is about 971.5815913413.

The spelling of 917144641 in words is "nine hundred seventeen million, one hundred forty-four thousand, six hundred forty-one".