1231032997 has 2 divisors, whose sum is σ = 1231032998. Its totient is φ = 1231032996.

The previous prime is 1231032991. The next prime is 1231033007. The reversal of 1231032997 is 7992301321.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 634989601 + 596043396 = 25199^2 + 24414^2 .

It is a cyclic number.

It is not a de Polignac number, because 1231032997 - 2³ = 1231032989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1231032991) 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, 615516498 + 615516499.

It is an arithmetic number, because the mean of its divisors is an integer number (615516499).

Almost surely, 2^1231032997 is an apocalyptic number.

It is an amenable number.

1231032997 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231032997 is an equidigital number, since it uses as much as digits as its factorization.

1231032997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20412, while the sum is 37.

The square root of 1231032997 is about 35086.0798180703. The cubic root of 1231032997 is about 1071.7411303737.

The spelling of 1231032997 in words is "one billion, two hundred thirty-one million, thirty-two thousand, nine hundred ninety-seven".