691412606 has 16 divisors (see below), whose sum is σ = 1073917440. Its totient is φ = 333463200.

The previous prime is 691412587. The next prime is 691412611. The reversal of 691412606 is 606214196.

It is a super-2 number, since 2×691412606² = 956102783471422472, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61580 + ... + 71936.

It is an arithmetic number, because the mean of its divisors is an integer number (67119840).

Almost surely, 2^691412606 is an apocalyptic number.

691412606 is a deficient number, since it is larger than the sum of its proper divisors (382504834).

691412606 is a wasteful number, since it uses less digits than its factorization.

691412606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11539.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 691412606 is about 26294.7258209703. The cubic root of 691412606 is about 884.2582039918.

The spelling of 691412606 in words is "six hundred ninety-one million, four hundred twelve thousand, six hundred six".