78812983 has 2 divisors, whose sum is σ = 78812984. Its totient is φ = 78812982.

The previous prime is 78812963. The next prime is 78812989. The reversal of 78812983 is 38921887.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78812983 - 2²¹ = 76715831 is a prime.

It is a super-2 number, since 2×78812983² = 12422972578716578, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78812989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39406491 + 39406492.

It is an arithmetic number, because the mean of its divisors is an integer number (39406492).

Almost surely, 2^78812983 is an apocalyptic number.

78812983 is a deficient number, since it is larger than the sum of its proper divisors (1).

78812983 is an equidigital number, since it uses as much as digits as its factorization.

78812983 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 193536, while the sum is 46.

The square root of 78812983 is about 8877.6676554149. The cubic root of 78812983 is about 428.7451844070.

The spelling of 78812983 in words is "seventy-eight million, eight hundred twelve thousand, nine hundred eighty-three".