3147239 has 2 divisors, whose sum is σ = 3147240. Its totient is φ = 3147238.

The previous prime is 3147233. The next prime is 3147241. The reversal of 3147239 is 9327413.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3147239 - 2⁴ = 3147223 is a prime.

It is a super-2 number, since 2×3147239² = 19810226646242, which contains 22 as substring.

Together with 3147241, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is a d-powerful number, because it can be written as 3 + 1 + 4¹⁰ + 7² + 2²¹ + 3⁶ + 9³ .

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3147233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1573619 + 1573620.

It is an arithmetic number, because the mean of its divisors is an integer number (1573620).

Almost surely, 2^3147239 is an apocalyptic number.

3147239 is a deficient number, since it is larger than the sum of its proper divisors (1).

3147239 is an equidigital number, since it uses as much as digits as its factorization.

3147239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4536, while the sum is 29.

The square root of 3147239 is about 1774.0459407806. The cubic root of 3147239 is about 146.5468793505.

The spelling of 3147239 in words is "three million, one hundred forty-seven thousand, two hundred thirty-nine".