78408563 has 2 divisors, whose sum is σ = 78408564. Its totient is φ = 78408562.

The previous prime is 78408557. The next prime is 78408569. The reversal of 78408563 is 36580487.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (78408557) and next prime (78408569).

It is a cyclic number.

It is not a de Polignac number, because 78408563 - 2²⁴ = 61631347 is a prime.

It is a super-2 number, since 2×78408563² = 12295805503449938, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78408563.

It is not a weakly prime, because it can be changed into another prime (78408569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39204281 + 39204282.

It is an arithmetic number, because the mean of its divisors is an integer number (39204282).

Almost surely, 2^78408563 is an apocalyptic number.

78408563 is a deficient number, since it is larger than the sum of its proper divisors (1).

78408563 is an equidigital number, since it uses as much as digits as its factorization.

78408563 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 161280, while the sum is 41.

The square root of 78408563 is about 8854.8609814045. The cubic root of 78408563 is about 428.0105738064.

The spelling of 78408563 in words is "seventy-eight million, four hundred eight thousand, five hundred sixty-three".