84078601 has 2 divisors, whose sum is σ = 84078602. Its totient is φ = 84078600.

The previous prime is 84078587. The next prime is 84078607. The reversal of 84078601 is 10687048.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49280400 + 34798201 = 7020^2 + 5899^2 .

It is a cyclic number.

It is not a de Polignac number, because 84078601 - 2⁷ = 84078473 is a prime.

It is a super-2 number, since 2×84078601² = 14138422292234402, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (84078607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42039300 + 42039301.

It is an arithmetic number, because the mean of its divisors is an integer number (42039301).

Almost surely, 2^84078601 is an apocalyptic number.

It is an amenable number.

84078601 is a deficient number, since it is larger than the sum of its proper divisors (1).

84078601 is an equidigital number, since it uses as much as digits as its factorization.

84078601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10752, while the sum is 34.

The square root of 84078601 is about 9169.4384233714. The cubic root of 84078601 is about 438.0884724292.

The spelling of 84078601 in words is "eighty-four million, seventy-eight thousand, six hundred one".