3131699 has 2 divisors, whose sum is σ = 3131700. Its totient is φ = 3131698.

The previous prime is 3131671. The next prime is 3131701. The reversal of 3131699 is 9961313.

It is a strong prime.

It is an emirp because it is prime and its reverse (9961313) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3131699 is a prime.

It is a Sophie Germain prime.

Together with 3131701, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (3131629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1565849 + 1565850.

It is an arithmetic number, because the mean of its divisors is an integer number (1565850).

Almost surely, 2^3131699 is an apocalyptic number.

3131699 is a deficient number, since it is larger than the sum of its proper divisors (1).

3131699 is an equidigital number, since it uses as much as digits as its factorization.

3131699 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4374, while the sum is 32.

The square root of 3131699 is about 1769.6607019426. The cubic root of 3131699 is about 146.3052816556.

The spelling of 3131699 in words is "three million, one hundred thirty-one thousand, six hundred ninety-nine".