137865771 has 6 divisors (see below), whose sum is σ = 199139460. Its totient is φ = 91910508.

The previous prime is 137865757. The next prime is 137865779. The reversal of 137865771 is 177568731.

137865771 is a `hidden beast` number, since 1 + 3 + 78 + 6 + 577 + 1 = 666.

137865771 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 137865771 - 2⁷ = 137865643 is a prime.

It is not an unprimeable number, because it can be changed into a prime (137865779) 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, 7659201 + ... + 7659218.

It is an arithmetic number, because the mean of its divisors is an integer number (33189910).

Almost surely, 2^137865771 is an apocalyptic number.

137865771 is a deficient number, since it is larger than the sum of its proper divisors (61273689).

137865771 is a wasteful number, since it uses less digits than its factorization.

137865771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15318425 (or 15318422 counting only the distinct ones).

The product of its digits is 246960, while the sum is 45.

The square root of 137865771 is about 11741.6255688895. The cubic root of 137865771 is about 516.5973229632.

The spelling of 137865771 in words is "one hundred thirty-seven million, eight hundred sixty-five thousand, seven hundred seventy-one".