78782801 has 2 divisors, whose sum is σ = 78782802. Its totient is φ = 78782800.

The previous prime is 78782779. The next prime is 78782813. The reversal of 78782801 is 10828787.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73942801 + 4840000 = 8599^2 + 2200^2 .

It is an emirp because it is prime and its reverse (10828787) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78782801 - 2¹⁴ = 78766417 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (78782881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39391400 + 39391401.

It is an arithmetic number, because the mean of its divisors is an integer number (39391401).

Almost surely, 2^78782801 is an apocalyptic number.

It is an amenable number.

78782801 is a deficient number, since it is larger than the sum of its proper divisors (1).

78782801 is an equidigital number, since it uses as much as digits as its factorization.

78782801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 50176, while the sum is 41.

The square root of 78782801 is about 8875.9676092244. The cubic root of 78782801 is about 428.6904470660.

The spelling of 78782801 in words is "seventy-eight million, seven hundred eighty-two thousand, eight hundred one".