1631793697 has 6 divisors (see below), whose sum is σ = 1643637138. Its totient is φ = 1620034992.

The previous prime is 1631793679. The next prime is 1631793707. The reversal of 1631793697 is 7963971361.

It can be written as a sum of positive squares in only one way, i.e., 1471796496 + 159997201 = 38364^2 + 12649^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1631793697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1631793607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22908 + ... + 61549.

It is an arithmetic number, because the mean of its divisors is an integer number (273939523).

Almost surely, 2^1631793697 is an apocalyptic number.

It is an amenable number.

1631793697 is a deficient number, since it is larger than the sum of its proper divisors (11843441).

1631793697 is an frugal number, since it uses more digits than its factorization.

1631793697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84735 (or 84596 counting only the distinct ones).

The product of its digits is 1285956, while the sum is 52.

The square root of 1631793697 is about 40395.4662926423. The cubic root of 1631793697 is about 1177.3034511004.

The spelling of 1631793697 in words is "one billion, six hundred thirty-one million, seven hundred ninety-three thousand, six hundred ninety-seven".