137770727 has 4 divisors (see below), whose sum is σ = 142214976. Its totient is φ = 133326480.

The previous prime is 137770687. The next prime is 137770733. The reversal of 137770727 is 727077731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 727077731 = 19 ⋅38267249.

It is a cyclic number.

It is not a de Polignac number, because 137770727 - 2⁶ = 137770663 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137770747) 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, 2222078 + ... + 2222139.

It is an arithmetic number, because the mean of its divisors is an integer number (35553744).

Almost surely, 2^137770727 is an apocalyptic number.

137770727 is a deficient number, since it is larger than the sum of its proper divisors (4444249).

137770727 is an equidigital number, since it uses as much as digits as its factorization.

137770727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4444248.

The product of its (nonzero) digits is 100842, while the sum is 41.

The square root of 137770727 is about 11737.5775609791. The cubic root of 137770727 is about 516.4785824353.

The spelling of 137770727 in words is "one hundred thirty-seven million, seven hundred seventy thousand, seven hundred twenty-seven".