137709959 has 2 divisors, whose sum is σ = 137709960. Its totient is φ = 137709958.

The previous prime is 137709937. The next prime is 137709973. The reversal of 137709959 is 959907731.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (959907731) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-137709959 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (137709259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68854979 + 68854980.

It is an arithmetic number, because the mean of its divisors is an integer number (68854980).

Almost surely, 2^137709959 is an apocalyptic number.

137709959 is a deficient number, since it is larger than the sum of its proper divisors (1).

137709959 is an equidigital number, since it uses as much as digits as its factorization.

137709959 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 535815, while the sum is 50.

The square root of 137709959 is about 11734.9886663771. The cubic root of 137709959 is about 516.4026350339.

The spelling of 137709959 in words is "one hundred thirty-seven million, seven hundred nine thousand, nine hundred fifty-nine".