78897163 has 2 divisors, whose sum is σ = 78897164. Its totient is φ = 78897162.

The previous prime is 78897157. The next prime is 78897173. The reversal of 78897163 is 36179887.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78897163 - 2¹⁷ = 78766091 is a prime.

It is not a weakly prime, because it can be changed into another prime (78897103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39448581 + 39448582.

It is an arithmetic number, because the mean of its divisors is an integer number (39448582).

Almost surely, 2^78897163 is an apocalyptic number.

78897163 is a deficient number, since it is larger than the sum of its proper divisors (1).

78897163 is an equidigital number, since it uses as much as digits as its factorization.

78897163 is an evil number, because the sum of its binary digits is even.

The product of its digits is 508032, while the sum is 49.

The square root of 78897163 is about 8882.4075002220. The cubic root of 78897163 is about 428.8977774022.

The spelling of 78897163 in words is "seventy-eight million, eight hundred ninety-seven thousand, one hundred sixty-three".