137878879 has 2 divisors, whose sum is σ = 137878880. Its totient is φ = 137878878.

The previous prime is 137878843. The next prime is 137878883. The reversal of 137878879 is 978878731.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 137878879 - 2¹¹ = 137876831 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (137878579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68939439 + 68939440.

It is an arithmetic number, because the mean of its divisors is an integer number (68939440).

Almost surely, 2^137878879 is an apocalyptic number.

137878879 is a deficient number, since it is larger than the sum of its proper divisors (1).

137878879 is an equidigital number, since it uses as much as digits as its factorization.

137878879 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4741632, while the sum is 58.

The square root of 137878879 is about 11742.1837406847. The cubic root of 137878879 is about 516.6136947889.

The spelling of 137878879 in words is "one hundred thirty-seven million, eight hundred seventy-eight thousand, eight hundred seventy-nine".