691397153 has 8 divisors (see below), whose sum is σ = 694376928. Its totient is φ = 688423744.

The previous prime is 691397143. The next prime is 691397209. The reversal of 691397153 is 351793196.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 691397153 - 2⁸ = 691396897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (691397143) 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, 444425 + ... + 445977.

It is an arithmetic number, because the mean of its divisors is an integer number (86797116).

Almost surely, 2^691397153 is an apocalyptic number.

It is an amenable number.

691397153 is a deficient number, since it is larger than the sum of its proper divisors (2979775).

691397153 is a wasteful number, since it uses less digits than its factorization.

691397153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3183.

The product of its digits is 153090, while the sum is 44.

The square root of 691397153 is about 26294.4319771316. The cubic root of 691397153 is about 884.2516162497.

The spelling of 691397153 in words is "six hundred ninety-one million, three hundred ninety-seven thousand, one hundred fifty-three".