1387232939 has 2 divisors, whose sum is σ = 1387232940. Its totient is φ = 1387232938.

The previous prime is 1387232887. The next prime is 1387232947. The reversal of 1387232939 is 9392327831.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1387232939 - 2¹⁶ = 1387167403 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1387232893 and 1387232902.

It is not a weakly prime, because it can be changed into another prime (1387232999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 693616469 + 693616470.

It is an arithmetic number, because the mean of its divisors is an integer number (693616470).

Almost surely, 2^1387232939 is an apocalyptic number.

1387232939 is a deficient number, since it is larger than the sum of its proper divisors (1).

1387232939 is an equidigital number, since it uses as much as digits as its factorization.

1387232939 is an evil number, because the sum of its binary digits is even.

The product of its digits is 489888, while the sum is 47.

The square root of 1387232939 is about 37245.5760997195. The cubic root of 1387232939 is about 1115.2779881586.

The spelling of 1387232939 in words is "one billion, three hundred eighty-seven million, two hundred thirty-two thousand, nine hundred thirty-nine".