83407609 has 2 divisors, whose sum is σ = 83407610. Its totient is φ = 83407608.

The previous prime is 83407607. The next prime is 83407619. The reversal of 83407609 is 90670438.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52881984 + 30525625 = 7272^2 + 5525^2 .

It is a cyclic number.

It is not a de Polignac number, because 83407609 - 2¹ = 83407607 is a prime.

Together with 83407607, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (83407607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41703804 + 41703805.

It is an arithmetic number, because the mean of its divisors is an integer number (41703805).

Almost surely, 2^83407609 is an apocalyptic number.

It is an amenable number.

83407609 is a deficient number, since it is larger than the sum of its proper divisors (1).

83407609 is an equidigital number, since it uses as much as digits as its factorization.

83407609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 83407609 is about 9132.7766314522. The cubic root of 83407609 is about 436.9199653746.

The spelling of 83407609 in words is "eighty-three million, four hundred seven thousand, six hundred nine".