691436486 has 32 divisors (see below), whose sum is σ = 1186600800. Its totient is φ = 299531520.

The previous prime is 691436479. The next prime is 691436489. The reversal of 691436486 is 684634196.

It is a self number, because there is not a number n which added to its sum of digits gives 691436486.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (691436489) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 47426 + ... + 60266.

It is an arithmetic number, because the mean of its divisors is an integer number (37081275).

Almost surely, 2^691436486 is an apocalyptic number.

691436486 is a deficient number, since it is larger than the sum of its proper divisors (495164314).

691436486 is a wasteful number, since it uses less digits than its factorization.

691436486 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12984.

The product of its digits is 746496, while the sum is 47.

The square root of 691436486 is about 26295.1799005065. The cubic root of 691436486 is about 884.2683840409.

The spelling of 691436486 in words is "six hundred ninety-one million, four hundred thirty-six thousand, four hundred eighty-six".