78332563 has 2 divisors, whose sum is σ = 78332564. Its totient is φ = 78332562.

The previous prime is 78332561. The next prime is 78332669. The reversal of 78332563 is 36523387.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78332563 - 2¹ = 78332561 is a prime.

It is a super-2 number, since 2×78332563² = 12271980852297938, which contains 22 as substring.

Together with 78332561, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (78332561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39166281 + 39166282.

It is an arithmetic number, because the mean of its divisors is an integer number (39166282).

Almost surely, 2^78332563 is an apocalyptic number.

78332563 is a deficient number, since it is larger than the sum of its proper divisors (1).

78332563 is an equidigital number, since it uses as much as digits as its factorization.

78332563 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 37.

The square root of 78332563 is about 8850.5685128132. The cubic root of 78332563 is about 427.8722414700.

The spelling of 78332563 in words is "seventy-eight million, three hundred thirty-two thousand, five hundred sixty-three".