870778201 has 4 divisors (see below), whose sum is σ = 876622500. Its totient is φ = 864933904.

The previous prime is 870778187. The next prime is 870778241. The reversal of 870778201 is 102877078.

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 136422400 + 734355801 = 11680^2 + 27099^2 .

It is a cyclic number.

It is not a de Polignac number, because 870778201 - 2⁵ = 870778169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (870778241) 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, 2921926 + ... + 2922223.

It is an arithmetic number, because the mean of its divisors is an integer number (219155625).

Almost surely, 2^870778201 is an apocalyptic number.

It is an amenable number.

870778201 is a deficient number, since it is larger than the sum of its proper divisors (5844299).

870778201 is a wasteful number, since it uses less digits than its factorization.

870778201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5844298.

The product of its (nonzero) digits is 43904, while the sum is 40.

The square root of 870778201 is about 29508.9512012881. The cubic root of 870778201 is about 954.9248228973.

The spelling of 870778201 in words is "eight hundred seventy million, seven hundred seventy-eight thousand, two hundred one".