1387750547 has 2 divisors, whose sum is σ = 1387750548. Its totient is φ = 1387750546.

The previous prime is 1387750531. The next prime is 1387750561. The reversal of 1387750547 is 7450577831.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1387750547 - 2⁴ = 1387750531 is a prime.

It is not a weakly prime, because it can be changed into another prime (1387750597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 693875273 + 693875274.

It is an arithmetic number, because the mean of its divisors is an integer number (693875274).

Almost surely, 2^1387750547 is an apocalyptic number.

1387750547 is a deficient number, since it is larger than the sum of its proper divisors (1).

1387750547 is an equidigital number, since it uses as much as digits as its factorization.

1387750547 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 823200, while the sum is 47.

The square root of 1387750547 is about 37252.5240352919. The cubic root of 1387750547 is about 1115.4166827280.

The spelling of 1387750547 in words is "one billion, three hundred eighty-seven million, seven hundred fifty thousand, five hundred forty-seven".