691983134 has 16 divisors (see below), whose sum is σ = 1047497616. Its totient is φ = 342825600.

The previous prime is 691983107. The next prime is 691983137. The reversal of 691983134 is 431389196.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (691983137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 213494 + ... + 216710.

It is an arithmetic number, because the mean of its divisors is an integer number (65468601).

Almost surely, 2^691983134 is an apocalyptic number.

691983134 is a deficient number, since it is larger than the sum of its proper divisors (355514482).

691983134 is a wasteful number, since it uses less digits than its factorization.

691983134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4171.

The product of its digits is 139968, while the sum is 44.

The square root of 691983134 is about 26305.5722994198. The cubic root of 691983134 is about 884.5013561321.

The spelling of 691983134 in words is "six hundred ninety-one million, nine hundred eighty-three thousand, one hundred thirty-four".