83647379 has 2 divisors, whose sum is σ = 83647380. Its totient is φ = 83647378.

The previous prime is 83647349. The next prime is 83647381. The reversal of 83647379 is 97374638.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 83647379 - 2¹² = 83643283 is a prime.

It is a Sophie Germain prime.

Together with 83647381, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (83647349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41823689 + 41823690.

It is an arithmetic number, because the mean of its divisors is an integer number (41823690).

Almost surely, 2^83647379 is an apocalyptic number.

83647379 is a deficient number, since it is larger than the sum of its proper divisors (1).

83647379 is an equidigital number, since it uses as much as digits as its factorization.

83647379 is an evil number, because the sum of its binary digits is even.

The product of its digits is 762048, while the sum is 47.

The square root of 83647379 is about 9145.8941061003. The cubic root of 83647379 is about 437.3382328737.

The spelling of 83647379 in words is "eighty-three million, six hundred forty-seven thousand, three hundred seventy-nine".