1387775123 has 16 divisors (see below), whose sum is σ = 1603588800. Its totient is φ = 1176422400.

The previous prime is 1387775119. The next prime is 1387775149. The reversal of 1387775123 is 3215777831.

It is a cyclic number.

It is not a de Polignac number, because 1387775123 - 2² = 1387775119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1387775423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 248603 + ... + 254123.

It is an arithmetic number, because the mean of its divisors is an integer number (100224300).

Almost surely, 2^1387775123 is an apocalyptic number.

1387775123 is a deficient number, since it is larger than the sum of its proper divisors (215813677).

1387775123 is a wasteful number, since it uses less digits than its factorization.

1387775123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5918.

The product of its digits is 246960, while the sum is 44.

The square root of 1387775123 is about 37252.8538906753. The cubic root of 1387775123 is about 1115.4232670811.

The spelling of 1387775123 in words is "one billion, three hundred eighty-seven million, seven hundred seventy-five thousand, one hundred twenty-three".