78723059 has 2 divisors, whose sum is σ = 78723060. Its totient is φ = 78723058.

The previous prime is 78723041. The next prime is 78723091. The reversal of 78723059 is 95032787.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78723059 is a prime.

It is not a weakly prime, because it can be changed into another prime (78723019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39361529 + 39361530.

It is an arithmetic number, because the mean of its divisors is an integer number (39361530).

Almost surely, 2^78723059 is an apocalyptic number.

78723059 is a deficient number, since it is larger than the sum of its proper divisors (1).

78723059 is an equidigital number, since it uses as much as digits as its factorization.

78723059 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 105840, while the sum is 41.

The square root of 78723059 is about 8872.6015914161. The cubic root of 78723059 is about 428.5820591913.

The spelling of 78723059 in words is "seventy-eight million, seven hundred twenty-three thousand, fifty-nine".