137355865 has 4 divisors (see below), whose sum is σ = 164827044. Its totient is φ = 109884688.

The previous prime is 137355857. The next prime is 137355871. The reversal of 137355865 is 568553731.

137355865 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 568553731 = 443 ⋅1283417.

It can be written as a sum of positive squares in 2 ways, for example, as 87385104 + 49970761 = 9348^2 + 7069^2 .

It is a cyclic number.

It is not a de Polignac number, because 137355865 - 2³ = 137355857 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13735582 + ... + 13735591.

It is an arithmetic number, because the mean of its divisors is an integer number (41206761).

Almost surely, 2^137355865 is an apocalyptic number.

It is an amenable number.

137355865 is a deficient number, since it is larger than the sum of its proper divisors (27471179).

137355865 is an equidigital number, since it uses as much as digits as its factorization.

137355865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27471178.

The product of its digits is 378000, while the sum is 43.

The square root of 137355865 is about 11719.8918510369. The cubic root of 137355865 is about 515.9596459538.

It can be divided in two parts, 13735 and 5865, that added together give a square (19600 = 140²).

The spelling of 137355865 in words is "one hundred thirty-seven million, three hundred fifty-five thousand, eight hundred sixty-five".