391696 has 10 divisors (see below), whose sum is σ = 758942. Its totient is φ = 195840.

The previous prime is 391693. The next prime is 391711. The reversal of 391696 is 696193.

391696 = T₁₀₃ + T₁₀₄ + ... + T₁₅₀.

It can be written as a sum of positive squares in only one way, i.e., 215296 + 176400 = 464^2 + 420^2 .

It is not an unprimeable number, because it can be changed into a prime (391691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12225 + ... + 12256.

2³⁹¹⁶⁹⁶ is an apocalyptic number.

It is an amenable number.

391696 is a deficient number, since it is larger than the sum of its proper divisors (367246).

391696 is a wasteful number, since it uses less digits than its factorization.

391696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24489 (or 24483 counting only the distinct ones).

The product of its digits is 8748, while the sum is 34.

The square root of 391696 is about 625.8562135187. The cubic root of 391696 is about 73.1671904483.

The spelling of 391696 in words is "three hundred ninety-one thousand, six hundred ninety-six".