1138572839 has 2 divisors, whose sum is σ = 1138572840. Its totient is φ = 1138572838.

The previous prime is 1138572833. The next prime is 1138572863. The reversal of 1138572839 is 9382758311.

It is a weak prime.

It is an emirp because it is prime and its reverse (9382758311) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1138572839 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 1138572793 and 1138572802.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1138572833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 569286419 + 569286420.

It is an arithmetic number, because the mean of its divisors is an integer number (569286420).

Almost surely, 2^1138572839 is an apocalyptic number.

1138572839 is a deficient number, since it is larger than the sum of its proper divisors (1).

1138572839 is an equidigital number, since it uses as much as digits as its factorization.

1138572839 is an evil number, because the sum of its binary digits is even.

The product of its digits is 362880, while the sum is 47.

The square root of 1138572839 is about 33742.7449831812. The cubic root of 1138572839 is about 1044.2078164000.

The spelling of 1138572839 in words is "one billion, one hundred thirty-eight million, five hundred seventy-two thousand, eight hundred thirty-nine".