137781367 has 2 divisors, whose sum is σ = 137781368. Its totient is φ = 137781366.

The previous prime is 137781359. The next prime is 137781373. The reversal of 137781367 is 763187731.

It is a strong prime.

It is an emirp because it is prime and its reverse (763187731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 137781367 - 2³ = 137781359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (137781307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68890683 + 68890684.

It is an arithmetic number, because the mean of its divisors is an integer number (68890684).

Almost surely, 2^137781367 is an apocalyptic number.

137781367 is a deficient number, since it is larger than the sum of its proper divisors (1).

137781367 is an equidigital number, since it uses as much as digits as its factorization.

137781367 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 148176, while the sum is 43.

The square root of 137781367 is about 11738.0307973697. The cubic root of 137781367 is about 516.4918779318.

The spelling of 137781367 in words is "one hundred thirty-seven million, seven hundred eighty-one thousand, three hundred sixty-seven".