137878927 has 2 divisors, whose sum is σ = 137878928. Its totient is φ = 137878926.

The previous prime is 137878913. The next prime is 137878931. The reversal of 137878927 is 729878731.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-137878927 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (137878987) by changing a digit.

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 as a sum of consecutive naturals, namely, 68939463 + 68939464.

It is an arithmetic number, because the mean of its divisors is an integer number (68939464).

Almost surely, 2^137878927 is an apocalyptic number.

137878927 is a deficient number, since it is larger than the sum of its proper divisors (1).

137878927 is an equidigital number, since it uses as much as digits as its factorization.

137878927 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1185408, while the sum is 52.

The square root of 137878927 is about 11742.1857845973. The cubic root of 137878927 is about 516.6137547387.

The spelling of 137878927 in words is "one hundred thirty-seven million, eight hundred seventy-eight thousand, nine hundred twenty-seven".