691374 has 16 divisors (see below), whose sum is σ = 1406160. Its totient is φ = 226560.

The previous prime is 691363. The next prime is 691381. The reversal of 691374 is 473196.

It is a happy number.

691374 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 691374.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 579 + ... + 1310.

It is an arithmetic number, because the mean of its divisors is an integer number (87885).

2⁶⁹¹³⁷⁴ is an apocalyptic number.

691374 is an abundant number, since it is smaller than the sum of its proper divisors (714786).

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

691374 is a wasteful number, since it uses less digits than its factorization.

691374 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1955.

The product of its digits is 4536, while the sum is 30.

The square root of 691374 is about 831.4890257845. The cubic root of 691374 is about 88.4241745750.

The spelling of 691374 in words is "six hundred ninety-one thousand, three hundred seventy-four".