691696254 has 16 divisors (see below), whose sum is σ = 1456202880. Its totient is φ = 218430360.

The previous prime is 691696253. The next prime is 691696297. The reversal of 691696254 is 452696196.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (691696253) 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 7 ways as a sum of consecutive naturals, for example, 3033642 + ... + 3033869.

It is an arithmetic number, because the mean of its divisors is an integer number (91012680).

Almost surely, 2^691696254 is an apocalyptic number.

691696254 is an abundant number, since it is smaller than the sum of its proper divisors (764506626).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

691696254 is a wasteful number, since it uses less digits than its factorization.

691696254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6067535.

The product of its digits is 699840, while the sum is 48.

The square root of 691696254 is about 26300.1188970696. The cubic root of 691696254 is about 884.3791080549.

The spelling of 691696254 in words is "six hundred ninety-one million, six hundred ninety-six thousand, two hundred fifty-four".