78733801 has 2 divisors, whose sum is σ = 78733802. Its totient is φ = 78733800.

The previous prime is 78733793. The next prime is 78733819. The reversal of 78733801 is 10833787.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42445225 + 36288576 = 6515^2 + 6024^2 .

It is a cyclic number.

It is not a de Polignac number, because 78733801 - 2³ = 78733793 is a prime.

It is a super-2 number, since 2×78733801² = 12398022839815202, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (78730801) 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, 39366900 + 39366901.

It is an arithmetic number, because the mean of its divisors is an integer number (39366901).

Almost surely, 2^78733801 is an apocalyptic number.

It is an amenable number.

78733801 is a deficient number, since it is larger than the sum of its proper divisors (1).

78733801 is an equidigital number, since it uses as much as digits as its factorization.

78733801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28224, while the sum is 37.

The square root of 78733801 is about 8873.2069174566. The cubic root of 78733801 is about 428.6015520784.

The spelling of 78733801 in words is "seventy-eight million, seven hundred thirty-three thousand, eight hundred one".