79083857 has 2 divisors, whose sum is σ = 79083858. Its totient is φ = 79083856.

The previous prime is 79083817. The next prime is 79083859. The reversal of 79083857 is 75838097.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74926336 + 4157521 = 8656^2 + 2039^2 .

It is an emirp because it is prime and its reverse (75838097) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 79083857 - 2²² = 74889553 is a prime.

Together with 79083859, 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 (79083859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39541928 + 39541929.

It is an arithmetic number, because the mean of its divisors is an integer number (39541929).

Almost surely, 2^79083857 is an apocalyptic number.

It is an amenable number.

79083857 is a deficient number, since it is larger than the sum of its proper divisors (1).

79083857 is an equidigital number, since it uses as much as digits as its factorization.

79083857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 423360, while the sum is 47.

The square root of 79083857 is about 8892.9104909473. The cubic root of 79083857 is about 429.2358105371.

The spelling of 79083857 in words is "seventy-nine million, eighty-three thousand, eight hundred fifty-seven".