137281091 has 2 divisors, whose sum is σ = 137281092. Its totient is φ = 137281090.

The previous prime is 137281019. The next prime is 137281097. The reversal of 137281091 is 190182731.

137281091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with previous prime (137281019) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 137281091 - 2²⁶ = 70172227 is a prime.

It is not a weakly prime, because it can be changed into another prime (137281097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68640545 + 68640546.

It is an arithmetic number, because the mean of its divisors is an integer number (68640546).

Almost surely, 2^137281091 is an apocalyptic number.

137281091 is a deficient number, since it is larger than the sum of its proper divisors (1).

137281091 is an equidigital number, since it uses as much as digits as its factorization.

137281091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 32.

The square root of 137281091 is about 11716.7013702663. The cubic root of 137281091 is about 515.8660026536.

The spelling of 137281091 in words is "one hundred thirty-seven million, two hundred eighty-one thousand, ninety-one".