78973319 has 2 divisors, whose sum is σ = 78973320. Its totient is φ = 78973318.

The previous prime is 78973309. The next prime is 78973333. The reversal of 78973319 is 91337987.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78973319 - 2⁴ = 78973303 is a prime.

It is a super-2 number, since 2×78973319² = 12473570227751522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78973309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39486659 + 39486660.

It is an arithmetic number, because the mean of its divisors is an integer number (39486660).

Almost surely, 2^78973319 is an apocalyptic number.

78973319 is a deficient number, since it is larger than the sum of its proper divisors (1).

78973319 is an equidigital number, since it uses as much as digits as its factorization.

78973319 is an evil number, because the sum of its binary digits is even.

The product of its digits is 285768, while the sum is 47.

The square root of 78973319 is about 8886.6933670517. The cubic root of 78973319 is about 429.0357318148.

The spelling of 78973319 in words is "seventy-eight million, nine hundred seventy-three thousand, three hundred nineteen".