1625711317 has 2 divisors, whose sum is σ = 1625711318. Its totient is φ = 1625711316.

The previous prime is 1625711299. The next prime is 1625711357. The reversal of 1625711317 is 7131175261.

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., 1238054596 + 387656721 = 35186^2 + 19689^2 .

It is a cyclic number.

It is not a de Polignac number, because 1625711317 - 2⁷ = 1625711189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1625711357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 812855658 + 812855659.

It is an arithmetic number, because the mean of its divisors is an integer number (812855659).

Almost surely, 2^1625711317 is an apocalyptic number.

It is an amenable number.

1625711317 is a deficient number, since it is larger than the sum of its proper divisors (1).

1625711317 is an equidigital number, since it uses as much as digits as its factorization.

1625711317 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8820, while the sum is 34.

The square root of 1625711317 is about 40320.1105777254. The cubic root of 1625711317 is about 1175.8388618452.

Adding to 1625711317 its reverse (7131175261), we get a palindrome (8756886578).

The spelling of 1625711317 in words is "one billion, six hundred twenty-five million, seven hundred eleven thousand, three hundred seventeen".