78863497 has 2 divisors, whose sum is σ = 78863498. Its totient is φ = 78863496.

The previous prime is 78863479. The next prime is 78863507. The reversal of 78863497 is 79436887.

It is a happy number.

Together with previous prime (78863479) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75064896 + 3798601 = 8664^2 + 1949^2 .

It is a cyclic number.

It is not a de Polignac number, because 78863497 - 2¹¹ = 78861449 is a prime.

It is not a weakly prime, because it can be changed into another prime (78863437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39431748 + 39431749.

It is an arithmetic number, because the mean of its divisors is an integer number (39431749).

Almost surely, 2^78863497 is an apocalyptic number.

It is an amenable number.

78863497 is a deficient number, since it is larger than the sum of its proper divisors (1).

78863497 is an equidigital number, since it uses as much as digits as its factorization.

78863497 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2032128, while the sum is 52.

The square root of 78863497 is about 8880.5122036964. The cubic root of 78863497 is about 428.8367641105.

The spelling of 78863497 in words is "seventy-eight million, eight hundred sixty-three thousand, four hundred ninety-seven".