137733691 has 2 divisors, whose sum is σ = 137733692. Its totient is φ = 137733690.

The previous prime is 137733689. The next prime is 137733737. The reversal of 137733691 is 196337731.

137733691 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (196337731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 137733691 - 2¹ = 137733689 is a prime.

Together with 137733689, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (137733091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68866845 + 68866846.

It is an arithmetic number, because the mean of its divisors is an integer number (68866846).

Almost surely, 2^137733691 is an apocalyptic number.

137733691 is a deficient number, since it is larger than the sum of its proper divisors (1).

137733691 is an equidigital number, since it uses as much as digits as its factorization.

137733691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 71442, while the sum is 40.

The square root of 137733691 is about 11735.9997869802. Note that the first 3 decimals coincide. The cubic root of 137733691 is about 516.4322977721.

The spelling of 137733691 in words is "one hundred thirty-seven million, seven hundred thirty-three thousand, six hundred ninety-one".