78963769 has 2 divisors, whose sum is σ = 78963770. Its totient is φ = 78963768.

The previous prime is 78963767. The next prime is 78963803. The reversal of 78963769 is 96736987.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67322025 + 11641744 = 8205^2 + 3412^2 .

It is a cyclic number.

It is not a de Polignac number, because 78963769 - 2¹ = 78963767 is a prime.

It is a super-2 number, since 2×78963769² = 12470553629370722, which contains 22 as substring.

Together with 78963767, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (78963767) 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, 39481884 + 39481885.

It is an arithmetic number, because the mean of its divisors is an integer number (39481885).

Almost surely, 2^78963769 is an apocalyptic number.

It is an amenable number.

78963769 is a deficient number, since it is larger than the sum of its proper divisors (1).

78963769 is an equidigital number, since it uses as much as digits as its factorization.

78963769 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3429216, while the sum is 55.

The square root of 78963769 is about 8886.1560305905. The cubic root of 78963769 is about 429.0184371282.

The spelling of 78963769 in words is "seventy-eight million, nine hundred sixty-three thousand, seven hundred sixty-nine".