691041212 has 24 divisors (see below), whose sum is σ = 1262378880. Its totient is φ = 330612480.

The previous prime is 691041199. The next prime is 691041223. The reversal of 691041212 is 212140196.

691041212 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 an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20273 + ... + 42344.

It is an arithmetic number, because the mean of its divisors is an integer number (52599120).

Almost surely, 2^691041212 is an apocalyptic number.

691041212 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

691041212 is a deficient number, since it is larger than the sum of its proper divisors (571337668).

691041212 is a wasteful number, since it uses less digits than its factorization.

691041212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62741 (or 62739 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 691041212 is about 26287.6627336855. The cubic root of 691041212 is about 884.0998484706.

The spelling of 691041212 in words is "six hundred ninety-one million, forty-one thousand, two hundred twelve".