78622201 has 4 divisors (see below), whose sum is σ = 89853952. Its totient is φ = 67390452.

The previous prime is 78622183. The next prime is 78622207. The reversal of 78622201 is 10222687.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 78622201 - 2¹⁷ = 78491129 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78622201.

It is not an unprimeable number, because it can be changed into a prime (78622207) 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, 5615865 + ... + 5615878.

It is an arithmetic number, because the mean of its divisors is an integer number (22463488).

Almost surely, 2^78622201 is an apocalyptic number.

It is an amenable number.

78622201 is a deficient number, since it is larger than the sum of its proper divisors (11231751).

78622201 is a wasteful number, since it uses less digits than its factorization.

78622201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11231750.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 78622201 is about 8866.9160929829. The cubic root of 78622201 is about 428.3989514589.

Adding to 78622201 its reverse (10222687), we get a palindrome (88844888).

The spelling of 78622201 in words is "seventy-eight million, six hundred twenty-two thousand, two hundred one".