3138917 has 2 divisors, whose sum is σ = 3138918. Its totient is φ = 3138916.

The previous prime is 3138913. The next prime is 3138929. The reversal of 3138917 is 7198313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1635841 + 1503076 = 1279^2 + 1226^2 .

It is a cyclic number.

It is not a de Polignac number, because 3138917 - 2² = 3138913 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3138911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1569458 + 1569459.

It is an arithmetic number, because the mean of its divisors is an integer number (1569459).

Almost surely, 2^3138917 is an apocalyptic number.

It is an amenable number.

3138917 is a deficient number, since it is larger than the sum of its proper divisors (1).

3138917 is an equidigital number, since it uses as much as digits as its factorization.

3138917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4536, while the sum is 32.

The square root of 3138917 is about 1771.6989021840. The cubic root of 3138917 is about 146.4175978179.

The spelling of 3138917 in words is "three million, one hundred thirty-eight thousand, nine hundred seventeen".