78908201 has 4 divisors (see below), whose sum is σ = 79794900. Its totient is φ = 78021504.

The previous prime is 78908189. The next prime is 78908209. The reversal of 78908201 is 10280987.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 25603600 + 53304601 = 5060^2 + 7301^2 .

It is a cyclic number.

It is not a de Polignac number, because 78908201 - 2²² = 74713897 is a prime.

It is a super-3 number, since 3×78908201³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (78908209) 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 in 3 ways as a sum of consecutive naturals, for example, 443216 + ... + 443393.

It is an arithmetic number, because the mean of its divisors is an integer number (19948725).

Almost surely, 2^78908201 is an apocalyptic number.

It is an amenable number.

78908201 is a deficient number, since it is larger than the sum of its proper divisors (886699).

78908201 is an equidigital number, since it uses as much as digits as its factorization.

78908201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 886698.

The product of its (nonzero) digits is 8064, while the sum is 35.

The square root of 78908201 is about 8883.0288190459. The cubic root of 78908201 is about 428.9177779224.

The spelling of 78908201 in words is "seventy-eight million, nine hundred eight thousand, two hundred one".