1631322697 has 2 divisors, whose sum is σ = 1631322698. Its totient is φ = 1631322696.

The previous prime is 1631322689. The next prime is 1631322701. The reversal of 1631322697 is 7962231361.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 872375296 + 758947401 = 29536^2 + 27549^2 .

It is a cyclic number.

It is not a de Polignac number, because 1631322697 - 2³ = 1631322689 is a prime.

It is a super-3 number, since 3×1631322697³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (1631322607) 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 as a sum of consecutive naturals, namely, 815661348 + 815661349.

It is an arithmetic number, because the mean of its divisors is an integer number (815661349).

Almost surely, 2^1631322697 is an apocalyptic number.

It is an amenable number.

1631322697 is a deficient number, since it is larger than the sum of its proper divisors (1).

1631322697 is an equidigital number, since it uses as much as digits as its factorization.

1631322697 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81648, while the sum is 40.

The square root of 1631322697 is about 40389.6360097488. The cubic root of 1631322697 is about 1177.1901681353.

The spelling of 1631322697 in words is "one billion, six hundred thirty-one million, three hundred twenty-two thousand, six hundred ninety-seven".