78326971 has 2 divisors, whose sum is σ = 78326972. Its totient is φ = 78326970.

The previous prime is 78326881. The next prime is 78326977. The reversal of 78326971 is 17962387.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78326971 is a prime.

It is a super-2 number, since 2×78326971² = 12270228772069682, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (78326977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39163485 + 39163486.

It is an arithmetic number, because the mean of its divisors is an integer number (39163486).

Almost surely, 2^78326971 is an apocalyptic number.

78326971 is a deficient number, since it is larger than the sum of its proper divisors (1).

78326971 is an equidigital number, since it uses as much as digits as its factorization.

78326971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 127008, while the sum is 43.

The square root of 78326971 is about 8850.2525952653. The cubic root of 78326971 is about 427.8620595890.

It can be divided in two parts, 78326 and 971, that added together give a palindrome (79297).

The spelling of 78326971 in words is "seventy-eight million, three hundred twenty-six thousand, nine hundred seventy-one".