3138491 has 2 divisors, whose sum is σ = 3138492. Its totient is φ = 3138490.

The previous prime is 3138469. The next prime is 3138493. The reversal of 3138491 is 1948313.

It is a strong prime.

It is an emirp because it is prime and its reverse (1948313) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3138491 - 2¹⁴ = 3122107 is a prime.

Together with 3138493, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (3138493) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1569245 + 1569246.

It is an arithmetic number, because the mean of its divisors is an integer number (1569246).

Almost surely, 2^3138491 is an apocalyptic number.

3138491 is a deficient number, since it is larger than the sum of its proper divisors (1).

3138491 is an equidigital number, since it uses as much as digits as its factorization.

3138491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2592, while the sum is 29.

The square root of 3138491 is about 1771.5786745160. The cubic root of 3138491 is about 146.4109738009.

The spelling of 3138491 in words is "three million, one hundred thirty-eight thousand, four hundred ninety-one".