1325239997 has 2 divisors, whose sum is σ = 1325239998. Its totient is φ = 1325239996.

The previous prime is 1325239957. The next prime is 1325240009. The reversal of 1325239997 is 7999325231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1238265721 + 86974276 = 35189^2 + 9326^2 .

It is a cyclic number.

It is not a de Polignac number, because 1325239997 - 2³⁰ = 251498173 is a prime.

It is a super-2 number, since 2×1325239997² = 3512522099297120018, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1325239957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 662619998 + 662619999.

It is an arithmetic number, because the mean of its divisors is an integer number (662619999).

Almost surely, 2^1325239997 is an apocalyptic number.

It is an amenable number.

1325239997 is a deficient number, since it is larger than the sum of its proper divisors (1).

1325239997 is an equidigital number, since it uses as much as digits as its factorization.

1325239997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 918540, while the sum is 50.

The square root of 1325239997 is about 36403.8459094640. The cubic root of 1325239997 is about 1098.4109278282.

The spelling of 1325239997 in words is "one billion, three hundred twenty-five million, two hundred thirty-nine thousand, nine hundred ninety-seven".