137745791 has 2 divisors, whose sum is σ = 137745792. Its totient is φ = 137745790.

The previous prime is 137745761. The next prime is 137745793. The reversal of 137745791 is 197547731.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-137745791 is a prime.

Together with 137745793, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (137745793) 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, 68872895 + 68872896.

It is an arithmetic number, because the mean of its divisors is an integer number (68872896).

Almost surely, 2^137745791 is an apocalyptic number.

137745791 is a deficient number, since it is larger than the sum of its proper divisors (1).

137745791 is an equidigital number, since it uses as much as digits as its factorization.

137745791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 185220, while the sum is 44.

The square root of 137745791 is about 11736.5152835073. The cubic root of 137745791 is about 516.4474203075.

The spelling of 137745791 in words is "one hundred thirty-seven million, seven hundred forty-five thousand, seven hundred ninety-one".