83137909 has 2 divisors, whose sum is σ = 83137910. Its totient is φ = 83137908.

The previous prime is 83137861. The next prime is 83137913. The reversal of 83137909 is 90973138.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75864100 + 7273809 = 8710^2 + 2697^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-83137909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83137969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41568954 + 41568955.

It is an arithmetic number, because the mean of its divisors is an integer number (41568955).

Almost surely, 2^83137909 is an apocalyptic number.

It is an amenable number.

83137909 is a deficient number, since it is larger than the sum of its proper divisors (1).

83137909 is an equidigital number, since it uses as much as digits as its factorization.

83137909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40824, while the sum is 40.

The square root of 83137909 is about 9117.9991774512. Note that the first 3 decimals coincide. The cubic root of 83137909 is about 436.4485273590.

The spelling of 83137909 in words is "eighty-three million, one hundred thirty-seven thousand, nine hundred nine".