1138965895 has 4 divisors (see below), whose sum is σ = 1366759080. Its totient is φ = 911172712.

The previous prime is 1138965889. The next prime is 1138965901. The reversal of 1138965895 is 5985698311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5985698311 = 4349 ⋅1376339.

It is an interprime number because it is at equal distance from previous prime (1138965889) and next prime (1138965901).

It is a cyclic number.

It is not a de Polignac number, because 1138965895 - 2⁷ = 1138965767 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 113896585 + ... + 113896594.

It is an arithmetic number, because the mean of its divisors is an integer number (341689770).

Almost surely, 2^1138965895 is an apocalyptic number.

1138965895 is a deficient number, since it is larger than the sum of its proper divisors (227793185).

1138965895 is an equidigital number, since it uses as much as digits as its factorization.

1138965895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227793184.

The product of its digits is 2332800, while the sum is 55.

The square root of 1138965895 is about 33748.5687844685. The cubic root of 1138965895 is about 1044.3279624030.

It can be divided in two parts, 11389 and 65895, that added together give a square (77284 = 278²).

The spelling of 1138965895 in words is "one billion, one hundred thirty-eight million, nine hundred sixty-five thousand, eight hundred ninety-five".