3121667 has 2 divisors, whose sum is σ = 3121668. Its totient is φ = 3121666.

The previous prime is 3121663. The next prime is 3121691. The reversal of 3121667 is 7661213.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3121667 - 2² = 3121663 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (3121663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1560833 + 1560834.

It is an arithmetic number, because the mean of its divisors is an integer number (1560834).

Almost surely, 2^3121667 is an apocalyptic number.

3121667 is a deficient number, since it is larger than the sum of its proper divisors (1).

3121667 is an equidigital number, since it uses as much as digits as its factorization.

3121667 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1512, while the sum is 26.

The square root of 3121667 is about 1766.8239867061. The cubic root of 3121667 is about 146.1488910814.

The spelling of 3121667 in words is "three million, one hundred twenty-one thousand, six hundred sixty-seven".