78343201 has 2 divisors, whose sum is σ = 78343202. Its totient is φ = 78343200.

The previous prime is 78343189. The next prime is 78343211. The reversal of 78343201 is 10234387.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76108176 + 2235025 = 8724^2 + 1495^2 .

It is a cyclic number.

It is not a de Polignac number, because 78343201 - 2⁷ = 78343073 is a prime.

It is a super-2 number, since 2×78343201² = 12275314285852802, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78343201.

It is not a weakly prime, because it can be changed into another prime (78343211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39171600 + 39171601.

It is an arithmetic number, because the mean of its divisors is an integer number (39171601).

Almost surely, 2^78343201 is an apocalyptic number.

It is an amenable number.

78343201 is a deficient number, since it is larger than the sum of its proper divisors (1).

78343201 is an equidigital number, since it uses as much as digits as its factorization.

78343201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 78343201 is about 8851.1694707536. The cubic root of 78343201 is about 427.8916097408.

Adding to 78343201 its reverse (10234387), we get a palindrome (88577588).

The spelling of 78343201 in words is "seventy-eight million, three hundred forty-three thousand, two hundred one".