3117997 has 2 divisors, whose sum is σ = 3117998. Its totient is φ = 3117996.

The previous prime is 3117991. The next prime is 3118007. The reversal of 3117997 is 7997113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2223081 + 894916 = 1491^2 + 946^2 .

It is an emirp because it is prime and its reverse (7997113) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3117997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3117991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1558998 + 1558999.

It is an arithmetic number, because the mean of its divisors is an integer number (1558999).

Almost surely, 2^3117997 is an apocalyptic number.

It is an amenable number.

3117997 is a deficient number, since it is larger than the sum of its proper divisors (1).

3117997 is an equidigital number, since it uses as much as digits as its factorization.

3117997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11907, while the sum is 37.

The square root of 3117997 is about 1765.7850945118. The cubic root of 3117997 is about 146.0915951173.

It can be divided in two parts, 3117 and 997, that added together give a palindrome (4114).

The spelling of 3117997 in words is "three million, one hundred seventeen thousand, nine hundred ninety-seven".