78504001 has 2 divisors, whose sum is σ = 78504002. Its totient is φ = 78504000.

The previous prime is 78503987. The next prime is 78504007. The reversal of 78504001 is 10040587.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77422401 + 1081600 = 8799^2 + 1040^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78504001 is a prime.

It is not a weakly prime, because it can be changed into another prime (78504007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39252000 + 39252001.

It is an arithmetic number, because the mean of its divisors is an integer number (39252001).

Almost surely, 2^78504001 is an apocalyptic number.

It is an amenable number.

78504001 is a deficient number, since it is larger than the sum of its proper divisors (1).

78504001 is an equidigital number, since it uses as much as digits as its factorization.

78504001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 78504001 is about 8860.2483599502. The cubic root of 78504001 is about 428.1841599104.

Adding to 78504001 its reverse (10040587), we get a palindrome (88544588).

The spelling of 78504001 in words is "seventy-eight million, five hundred four thousand, one".