137720419 has 2 divisors, whose sum is σ = 137720420. Its totient is φ = 137720418.

The previous prime is 137720377. The next prime is 137720477. The reversal of 137720419 is 914027731.

It is a weak prime.

It is an emirp because it is prime and its reverse (914027731) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-137720419 is a prime.

It is a super-2 number, since 2×137720419² = 37933827619071122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (137726419) 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, 68860209 + 68860210.

It is an arithmetic number, because the mean of its divisors is an integer number (68860210).

Almost surely, 2^137720419 is an apocalyptic number.

137720419 is a deficient number, since it is larger than the sum of its proper divisors (1).

137720419 is an equidigital number, since it uses as much as digits as its factorization.

137720419 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10584, while the sum is 34.

The square root of 137720419 is about 11735.4343336751. The cubic root of 137720419 is about 516.4157094570.

The spelling of 137720419 in words is "one hundred thirty-seven million, seven hundred twenty thousand, four hundred nineteen".