691364774 has 16 divisors (see below), whose sum is σ = 1082924640. Its totient is φ = 330411840.

The previous prime is 691364749. The next prime is 691364777. The reversal of 691364774 is 477463196.

It is a happy number.

691364774 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 not an unprimeable number, because it can be changed into a prime (691364777) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69344 + ... + 78684.

It is an arithmetic number, because the mean of its divisors is an integer number (67682790).

Almost surely, 2^691364774 is an apocalyptic number.

691364774 is a deficient number, since it is larger than the sum of its proper divisors (391559866).

691364774 is a wasteful number, since it uses less digits than its factorization.

691364774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10975.

The product of its digits is 762048, while the sum is 47.

The square root of 691364774 is about 26293.8162692295. The cubic root of 691364774 is about 884.2378124950.

The spelling of 691364774 in words is "six hundred ninety-one million, three hundred sixty-four thousand, seven hundred seventy-four".