1387256047 has 2 divisors, whose sum is σ = 1387256048. Its totient is φ = 1387256046.

The previous prime is 1387256041. The next prime is 1387256053. The reversal of 1387256047 is 7406527831.

It is a balanced prime because it is at equal distance from previous prime (1387256041) and next prime (1387256053).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1387256047 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1387255994 and 1387256012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1387256041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 693628023 + 693628024.

It is an arithmetic number, because the mean of its divisors is an integer number (693628024).

Almost surely, 2^1387256047 is an apocalyptic number.

1387256047 is a deficient number, since it is larger than the sum of its proper divisors (1).

1387256047 is an equidigital number, since it uses as much as digits as its factorization.

1387256047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 282240, while the sum is 43.

The square root of 1387256047 is about 37245.8863097658. The cubic root of 1387256047 is about 1115.2841807501.

The spelling of 1387256047 in words is "one billion, three hundred eighty-seven million, two hundred fifty-six thousand, forty-seven".