691492 has 12 divisors (see below), whose sum is σ = 1281420. Its totient is φ = 325376.

The previous prime is 691489. The next prime is 691499. The reversal of 691492 is 294196.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 599076 + 92416 = 774^2 + 304^2 .

It is a super-2 number, since 2×691492² = 956322372128, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (691499) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5017 + ... + 5152.

It is an arithmetic number, because the mean of its divisors is an integer number (106785).

2⁶⁹¹⁴⁹² is an apocalyptic number.

It is an amenable number.

691492 is a deficient number, since it is larger than the sum of its proper divisors (589928).

691492 is a wasteful number, since it uses less digits than its factorization.

691492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10190 (or 10188 counting only the distinct ones).

The product of its digits is 3888, while the sum is 31.

The square root of 691492 is about 831.5599797970. The cubic root of 691492 is about 88.4292048765.

The spelling of 691492 in words is "six hundred ninety-one thousand, four hundred ninety-two".