691742 has 8 divisors (see below), whose sum is σ = 1044696. Its totient is φ = 343512.

The previous prime is 691739. The next prime is 691759. The reversal of 691742 is 247196.

691742 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

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 691742.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 788 + ... + 1415.

It is an arithmetic number, because the mean of its divisors is an integer number (130587).

2⁶⁹¹⁷⁴² is an apocalyptic number.

691742 is a deficient number, since it is larger than the sum of its proper divisors (352954).

691742 is a wasteful number, since it uses less digits than its factorization.

691742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2362.

The product of its digits is 3024, while the sum is 29.

The square root of 691742 is about 831.7102860973. The cubic root of 691742 is about 88.4398604047.

The spelling of 691742 in words is "six hundred ninety-one thousand, seven hundred forty-two".