137681563 has 2 divisors, whose sum is σ = 137681564. Its totient is φ = 137681562.

The previous prime is 137681539. The next prime is 137681569. The reversal of 137681563 is 365186731.

It is a happy number.

137681563 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 137681563 - 2⁹ = 137681051 is a prime.

It is not a weakly prime, because it can be changed into another prime (137681569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68840781 + 68840782.

It is an arithmetic number, because the mean of its divisors is an integer number (68840782).

Almost surely, 2^137681563 is an apocalyptic number.

137681563 is a deficient number, since it is larger than the sum of its proper divisors (1).

137681563 is an equidigital number, since it uses as much as digits as its factorization.

137681563 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 40.

The square root of 137681563 is about 11733.7787178726. The cubic root of 137681563 is about 516.3671382614.

The spelling of 137681563 in words is "one hundred thirty-seven million, six hundred eighty-one thousand, five hundred sixty-three".