78837679 has 2 divisors, whose sum is σ = 78837680. Its totient is φ = 78837678.

The previous prime is 78837677. The next prime is 78837683. The reversal of 78837679 is 97673887.

It is a weak prime.

It is an emirp because it is prime and its reverse (97673887) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78837679 - 2¹ = 78837677 is a prime.

Together with 78837677, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78837673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39418839 + 39418840.

It is an arithmetic number, because the mean of its divisors is an integer number (39418840).

Almost surely, 2^78837679 is an apocalyptic number.

78837679 is a deficient number, since it is larger than the sum of its proper divisors (1).

78837679 is an equidigital number, since it uses as much as digits as its factorization.

78837679 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3556224, while the sum is 55.

The square root of 78837679 is about 8879.0584523360. The cubic root of 78837679 is about 428.7899620774.

The spelling of 78837679 in words is "seventy-eight million, eight hundred thirty-seven thousand, six hundred seventy-nine".