137982281 has 2 divisors, whose sum is σ = 137982282. Its totient is φ = 137982280.

The previous prime is 137982259. The next prime is 137982283. The reversal of 137982281 is 182289731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110775625 + 27206656 = 10525^2 + 5216^2 .

It is a cyclic number.

It is not a de Polignac number, because 137982281 - 2¹⁰ = 137981257 is a prime.

It is a super-2 number, since 2×137982281² = 38078219739925922, which contains 22 as substring.

Together with 137982283, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (137982283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68991140 + 68991141.

It is an arithmetic number, because the mean of its divisors is an integer number (68991141).

Almost surely, 2^137982281 is an apocalyptic number.

It is an amenable number.

137982281 is a deficient number, since it is larger than the sum of its proper divisors (1).

137982281 is an equidigital number, since it uses as much as digits as its factorization.

137982281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48384, while the sum is 41.

The square root of 137982281 is about 11746.5859295371. The cubic root of 137982281 is about 516.7428070005.

The spelling of 137982281 in words is "one hundred thirty-seven million, nine hundred eighty-two thousand, two hundred eighty-one".