931319689 has 8 divisors (see below), whose sum is σ = 935732808. Its totient is φ = 926916480.

The previous prime is 931319663. The next prime is 931319707. The reversal of 931319689 is 986913139.

It can be written as a sum of positive squares in 4 ways, for example, as 54686025 + 876633664 = 7395^2 + 29608^2 .

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 931319689 - 2¹⁵ = 931286921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (931313689) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 238029 + ... + 241909.

It is an arithmetic number, because the mean of its divisors is an integer number (116966601).

Almost surely, 2^931319689 is an apocalyptic number.

It is an amenable number.

931319689 is a deficient number, since it is larger than the sum of its proper divisors (4413119).

931319689 is a wasteful number, since it uses less digits than its factorization.

931319689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4955.

The product of its digits is 314928, while the sum is 49.

The square root of 931319689 is about 30517.5308470394. The cubic root of 931319689 is about 976.5614914032.

The spelling of 931319689 in words is "nine hundred thirty-one million, three hundred nineteen thousand, six hundred eighty-nine".