1387911133 has 6 divisors (see below), whose sum is σ = 1614508926. Its totient is φ = 1189638072.

The previous prime is 1387911089. The next prime is 1387911157. The reversal of 1387911133 is 3311197831.

It can be written as a sum of positive squares in only one way, i.e., 956850489 + 431060644 = 30933^2 + 20762^2 .

It is not a de Polignac number, because 1387911133 - 2¹³ = 1387902941 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1387911092 and 1387911101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1387911193) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14162310 + ... + 14162407.

It is an arithmetic number, because the mean of its divisors is an integer number (269084821).

Almost surely, 2^1387911133 is an apocalyptic number.

It is an amenable number.

1387911133 is a deficient number, since it is larger than the sum of its proper divisors (226597793).

1387911133 is an equidigital number, since it uses as much as digits as its factorization.

1387911133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28324731 (or 28324724 counting only the distinct ones).

The product of its digits is 13608, while the sum is 37.

The square root of 1387911133 is about 37254.6793436744. The cubic root of 1387911133 is about 1115.4597052043.

The spelling of 1387911133 in words is "one billion, three hundred eighty-seven million, nine hundred eleven thousand, one hundred thirty-three".