137945219 has 2 divisors, whose sum is σ = 137945220. Its totient is φ = 137945218.

The previous prime is 137945209. The next prime is 137945239. The reversal of 137945219 is 912549731.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 137945219 - 2¹² = 137941123 is a prime.

It is a super-2 number, since 2×137945219² = 38057766889915922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (137945209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68972609 + 68972610.

It is an arithmetic number, because the mean of its divisors is an integer number (68972610).

Almost surely, 2^137945219 is an apocalyptic number.

137945219 is a deficient number, since it is larger than the sum of its proper divisors (1).

137945219 is an equidigital number, since it uses as much as digits as its factorization.

137945219 is an evil number, because the sum of its binary digits is even.

The product of its digits is 68040, while the sum is 41.

The square root of 137945219 is about 11745.0082588306. The cubic root of 137945219 is about 516.6965372024.

The spelling of 137945219 in words is "one hundred thirty-seven million, nine hundred forty-five thousand, two hundred nineteen".