137663191 has 2 divisors, whose sum is σ = 137663192. Its totient is φ = 137663190.

The previous prime is 137663159. The next prime is 137663213. The reversal of 137663191 is 191366731.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 137663191 - 2⁵ = 137663159 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 137663191.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (137663891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68831595 + 68831596.

It is an arithmetic number, because the mean of its divisors is an integer number (68831596).

Almost surely, 2^137663191 is an apocalyptic number.

137663191 is a deficient number, since it is larger than the sum of its proper divisors (1).

137663191 is an equidigital number, since it uses as much as digits as its factorization.

137663191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20412, while the sum is 37.

The square root of 137663191 is about 11732.9958237442. The cubic root of 137663191 is about 516.3441695142.

The spelling of 137663191 in words is "one hundred thirty-seven million, six hundred sixty-three thousand, one hundred ninety-one".