137842091 has 4 divisors (see below), whose sum is σ = 138687912. Its totient is φ = 136996272.

The previous prime is 137842063. The next prime is 137842097. The reversal of 137842091 is 190248731.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-137842091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (137842097) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 422666 + ... + 422991.

It is an arithmetic number, because the mean of its divisors is an integer number (34671978).

Almost surely, 2^137842091 is an apocalyptic number.

137842091 is a deficient number, since it is larger than the sum of its proper divisors (845821).

137842091 is an equidigital number, since it uses as much as digits as its factorization.

137842091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 845820.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 137842091 is about 11740.6171473224. The cubic root of 137842091 is about 516.5677441321.

The spelling of 137842091 in words is "one hundred thirty-seven million, eight hundred forty-two thousand, ninety-one".