137241809 has 2 divisors, whose sum is σ = 137241810. Its totient is φ = 137241808.

The previous prime is 137241803. The next prime is 137241859. The reversal of 137241809 is 908142731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 133911184 + 3330625 = 11572^2 + 1825^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-137241809 is a prime.

It is not a weakly prime, because it can be changed into another prime (137241803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68620904 + 68620905.

It is an arithmetic number, because the mean of its divisors is an integer number (68620905).

Almost surely, 2^137241809 is an apocalyptic number.

It is an amenable number.

137241809 is a deficient number, since it is larger than the sum of its proper divisors (1).

137241809 is an equidigital number, since it uses as much as digits as its factorization.

137241809 is an odious number, because the sum of its binary digits is odd.

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

The square root of 137241809 is about 11715.0249252829. The cubic root of 137241809 is about 515.8167941736.

The spelling of 137241809 in words is "one hundred thirty-seven million, two hundred forty-one thousand, eight hundred nine".