691263794 has 16 divisors (see below), whose sum is σ = 1125454848. Its totient is φ = 316531152.

The previous prime is 691263779. The next prime is 691263799. The reversal of 691263794 is 497362196.

It is a happy number.

691263794 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (691263799) 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, 101372 + ... + 107975.

It is an arithmetic number, because the mean of its divisors is an integer number (70340928).

Almost surely, 2^691263794 is an apocalyptic number.

691263794 is a deficient number, since it is larger than the sum of its proper divisors (434191054).

691263794 is a wasteful number, since it uses less digits than its factorization.

691263794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209489.

The product of its digits is 489888, while the sum is 47.

The square root of 691263794 is about 26291.8959757565. The cubic root of 691263794 is about 884.1947601222.

The spelling of 691263794 in words is "six hundred ninety-one million, two hundred sixty-three thousand, seven hundred ninety-four".