1387869233 has 2 divisors, whose sum is σ = 1387869234. Its totient is φ = 1387869232.

The previous prime is 1387869191. The next prime is 1387869281. The reversal of 1387869233 is 3329687831.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 698439184 + 689430049 = 26428^2 + 26257^2 .

It is a cyclic number.

It is not a de Polignac number, because 1387869233 - 2²⁰ = 1386820657 is a prime.

It is not a weakly prime, because it can be changed into another prime (1387869283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 693934616 + 693934617.

It is an arithmetic number, because the mean of its divisors is an integer number (693934617).

Almost surely, 2^1387869233 is an apocalyptic number.

It is an amenable number.

1387869233 is a deficient number, since it is larger than the sum of its proper divisors (1).

1387869233 is an equidigital number, since it uses as much as digits as its factorization.

1387869233 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1306368, while the sum is 50.

The square root of 1387869233 is about 37254.1169939646. The cubic root of 1387869233 is about 1115.4484801263.

The spelling of 1387869233 in words is "one billion, three hundred eighty-seven million, eight hundred sixty-nine thousand, two hundred thirty-three".