691324454 has 16 divisors (see below), whose sum is σ = 1052306640. Its totient is φ = 340565760.

The previous prime is 691324451. The next prime is 691324463. The reversal of 691324454 is 454423196.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (691324451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 181934 + ... + 185694.

It is an arithmetic number, because the mean of its divisors is an integer number (65769165).

Almost surely, 2^691324454 is an apocalyptic number.

691324454 is a deficient number, since it is larger than the sum of its proper divisors (360982186).

691324454 is a wasteful number, since it uses less digits than its factorization.

691324454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5095.

The product of its digits is 103680, while the sum is 38.

The square root of 691324454 is about 26293.0495378532. The cubic root of 691324454 is about 884.2206227456.

The spelling of 691324454 in words is "six hundred ninety-one million, three hundred twenty-four thousand, four hundred fifty-four".