137694617 has 2 divisors, whose sum is σ = 137694618. Its totient is φ = 137694616.

The previous prime is 137694607. The next prime is 137694619. The reversal of 137694617 is 716496731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 135745801 + 1948816 = 11651^2 + 1396^2 .

It is an emirp because it is prime and its reverse (716496731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 137694617 - 2⁶ = 137694553 is a prime.

Together with 137694619, 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 (137694619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68847308 + 68847309.

It is an arithmetic number, because the mean of its divisors is an integer number (68847309).

Almost surely, 2^137694617 is an apocalyptic number.

It is an amenable number.

137694617 is a deficient number, since it is larger than the sum of its proper divisors (1).

137694617 is an equidigital number, since it uses as much as digits as its factorization.

137694617 is an evil number, because the sum of its binary digits is even.

The product of its digits is 190512, while the sum is 44.

The square root of 137694617 is about 11734.3349619823. The cubic root of 137694617 is about 516.3834571823.

The spelling of 137694617 in words is "one hundred thirty-seven million, six hundred ninety-four thousand, six hundred seventeen".