137897171 has 2 divisors, whose sum is σ = 137897172. Its totient is φ = 137897170.

The previous prime is 137897143. The next prime is 137897191. The reversal of 137897171 is 171798731.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 137897171 - 2¹⁰ = 137896147 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (137897131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68948585 + 68948586.

It is an arithmetic number, because the mean of its divisors is an integer number (68948586).

Almost surely, 2^137897171 is an apocalyptic number.

137897171 is a deficient number, since it is larger than the sum of its proper divisors (1).

137897171 is an equidigital number, since it uses as much as digits as its factorization.

137897171 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 74088, while the sum is 44.

The square root of 137897171 is about 11742.9626159671. The cubic root of 137897171 is about 516.6365396701.

The spelling of 137897171 in words is "one hundred thirty-seven million, eight hundred ninety-seven thousand, one hundred seventy-one".