78940201 has 4 divisors (see below), whose sum is σ = 78966100. Its totient is φ = 78914304.

The previous prime is 78940189. The next prime is 78940219. The reversal of 78940201 is 10204987.

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 20034576 + 58905625 = 4476^2 + 7675^2 .

It is a cyclic number.

It is not a de Polignac number, because 78940201 - 2⁹ = 78939689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78940261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7656 + ... + 14713.

It is an arithmetic number, because the mean of its divisors is an integer number (19741525).

Almost surely, 2^78940201 is an apocalyptic number.

It is an amenable number.

78940201 is a deficient number, since it is larger than the sum of its proper divisors (25899).

78940201 is a wasteful number, since it uses less digits than its factorization.

78940201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25898.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 78940201 is about 8884.8298239190. The cubic root of 78940201 is about 428.9757504092.

The spelling of 78940201 in words is "seventy-eight million, nine hundred forty thousand, two hundred one".