137316643 has 2 divisors, whose sum is σ = 137316644. Its totient is φ = 137316642.

The previous prime is 137316617. The next prime is 137316661. The reversal of 137316643 is 346613731.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-137316643 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 137316599 and 137316608.

It is not a weakly prime, because it can be changed into another prime (137316043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68658321 + 68658322.

It is an arithmetic number, because the mean of its divisors is an integer number (68658322).

Almost surely, 2^137316643 is an apocalyptic number.

137316643 is a deficient number, since it is larger than the sum of its proper divisors (1).

137316643 is an equidigital number, since it uses as much as digits as its factorization.

137316643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27216, while the sum is 34.

The square root of 137316643 is about 11718.2184226102. The cubic root of 137316643 is about 515.9105304786.

The spelling of 137316643 in words is "one hundred thirty-seven million, three hundred sixteen thousand, six hundred forty-three".