78997883 has 2 divisors, whose sum is σ = 78997884. Its totient is φ = 78997882.

The previous prime is 78997871. The next prime is 78997949. The reversal of 78997883 is 38879987.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78997883 - 2¹⁰ = 78996859 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (78997483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39498941 + 39498942.

It is an arithmetic number, because the mean of its divisors is an integer number (39498942).

Almost surely, 2^78997883 is an apocalyptic number.

78997883 is a deficient number, since it is larger than the sum of its proper divisors (1).

78997883 is an equidigital number, since it uses as much as digits as its factorization.

78997883 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6096384, while the sum is 59.

The square root of 78997883 is about 8888.0753259634. The cubic root of 78997883 is about 429.0802098797.

The spelling of 78997883 in words is "seventy-eight million, nine hundred ninety-seven thousand, eight hundred eighty-three".