1139752687 has 4 divisors (see below), whose sum is σ = 1139946616. Its totient is φ = 1139558760.

The previous prime is 1139752673. The next prime is 1139752697. The reversal of 1139752687 is 7862579311.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7862579311 = 157 ⋅50080123.

It is a cyclic number.

It is not a de Polignac number, because 1139752687 - 2²³ = 1131364079 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1139752687.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1139752667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87864 + ... + 99997.

It is an arithmetic number, because the mean of its divisors is an integer number (284986654).

Almost surely, 2^1139752687 is an apocalyptic number.

1139752687 is a deficient number, since it is larger than the sum of its proper divisors (193929).

1139752687 is an equidigital number, since it uses as much as digits as its factorization.

1139752687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193928.

The product of its digits is 635040, while the sum is 49.

The square root of 1139752687 is about 33760.2234441658. The cubic root of 1139752687 is about 1044.5683792468.

The spelling of 1139752687 in words is "one billion, one hundred thirty-nine million, seven hundred fifty-two thousand, six hundred eighty-seven".