691412 has 6 divisors (see below), whose sum is σ = 1209978. Its totient is φ = 345704.

The previous prime is 691409. The next prime is 691433. The reversal of 691412 is 214196.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 414736 + 276676 = 644^2 + 526^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86423 + ... + 86430.

It is an arithmetic number, because the mean of its divisors is an integer number (201663).

2⁶⁹¹⁴¹² is an apocalyptic number.

It is an amenable number.

691412 is a deficient number, since it is larger than the sum of its proper divisors (518566).

691412 is a wasteful number, since it uses less digits than its factorization.

691412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172857 (or 172855 counting only the distinct ones).

The product of its digits is 432, while the sum is 23.

The square root of 691412 is about 831.5118760427. The cubic root of 691412 is about 88.4257945651.

The spelling of 691412 in words is "six hundred ninety-one thousand, four hundred twelve".