137020717 has 2 divisors, whose sum is σ = 137020718. Its totient is φ = 137020716.

The previous prime is 137020643. The next prime is 137020727. The reversal of 137020717 is 717020731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75099556 + 61921161 = 8666^2 + 7869^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-137020717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (137020727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68510358 + 68510359.

It is an arithmetic number, because the mean of its divisors is an integer number (68510359).

Almost surely, 2^137020717 is an apocalyptic number.

It is an amenable number.

137020717 is a deficient number, since it is larger than the sum of its proper divisors (1).

137020717 is an equidigital number, since it uses as much as digits as its factorization.

137020717 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2058, while the sum is 28.

The square root of 137020717 is about 11705.5848636452. The cubic root of 137020717 is about 515.5396573882.

The spelling of 137020717 in words is "one hundred thirty-seven million, twenty thousand, seven hundred seventeen".