981692317 has 4 divisors (see below), whose sum is σ = 983093436. Its totient is φ = 980291200.

The previous prime is 981692303. The next prime is 981692329. The reversal of 981692317 is 713296189.

It is a happy number.

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 868716676 + 112975641 = 29474^2 + 10629^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-981692317 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 (981692617) 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, 699508 + ... + 700909.

It is an arithmetic number, because the mean of its divisors is an integer number (245773359).

Almost surely, 2^981692317 is an apocalyptic number.

It is an amenable number.

981692317 is a deficient number, since it is larger than the sum of its proper divisors (1401119).

981692317 is a wasteful number, since it uses less digits than its factorization.

981692317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1401118.

The product of its digits is 163296, while the sum is 46.

The square root of 981692317 is about 31331.9695678392. The cubic root of 981692317 is about 993.8598142849.

The spelling of 981692317 in words is "nine hundred eighty-one million, six hundred ninety-two thousand, three hundred seventeen".