691910982 has 96 divisors (see below), whose sum is σ = 1823357952. Its totient is φ = 185110272.

The previous prime is 691910981. The next prime is 691910987. The reversal of 691910982 is 289019196.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (691910981) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 485523 + ... + 486945.

It is an arithmetic number, because the mean of its divisors is an integer number (18993312).

Almost surely, 2^691910982 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 691910982, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (911678976).

691910982 is an abundant number, since it is smaller than the sum of its proper divisors (1131446970).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

691910982 is a wasteful number, since it uses less digits than its factorization.

691910982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1682 (or 1679 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 45.

The square root of 691910982 is about 26304.2008432113. The cubic root of 691910982 is about 884.4706132055.

The spelling of 691910982 in words is "six hundred ninety-one million, nine hundred ten thousand, nine hundred eighty-two".