78477563 has 2 divisors, whose sum is σ = 78477564. Its totient is φ = 78477562.

The previous prime is 78477547. The next prime is 78477583. The reversal of 78477563 is 36577487.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78477563 - 2⁴ = 78477547 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (78477533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39238781 + 39238782.

It is an arithmetic number, because the mean of its divisors is an integer number (39238782).

Almost surely, 2^78477563 is an apocalyptic number.

78477563 is a deficient number, since it is larger than the sum of its proper divisors (1).

78477563 is an equidigital number, since it uses as much as digits as its factorization.

78477563 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 987840, while the sum is 47.

The square root of 78477563 is about 8858.7562896831. The cubic root of 78477563 is about 428.1360876096.

The spelling of 78477563 in words is "seventy-eight million, four hundred seventy-seven thousand, five hundred sixty-three".