3138717847 has 2 divisors, whose sum is σ = 3138717848. Its totient is φ = 3138717846.

The previous prime is 3138717797. The next prime is 3138717859. The reversal of 3138717847 is 7487178313.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3138717847 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3138717847.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3138717247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1569358923 + 1569358924.

It is an arithmetic number, because the mean of its divisors is an integer number (1569358924).

Almost surely, 2^3138717847 is an apocalyptic number.

3138717847 is a deficient number, since it is larger than the sum of its proper divisors (1).

3138717847 is an equidigital number, since it uses as much as digits as its factorization.

3138717847 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 790272, while the sum is 49.

The square root of 3138717847 is about 56024.2612356468. The cubic root of 3138717847 is about 1464.1450119567.

The spelling of 3138717847 in words is "three billion, one hundred thirty-eight million, seven hundred seventeen thousand, eight hundred forty-seven".