867378261 has 4 divisors (see below), whose sum is σ = 1156504352. Its totient is φ = 578252172.

The previous prime is 867378229. The next prime is 867378269. The reversal of 867378261 is 162873768.

867378261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 not a de Polignac number, because 867378261 - 2⁵ = 867378229 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 867378261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (867378269) 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, 144563041 + ... + 144563046.

It is an arithmetic number, because the mean of its divisors is an integer number (289126088).

Almost surely, 2^867378261 is an apocalyptic number.

It is an amenable number.

867378261 is a deficient number, since it is larger than the sum of its proper divisors (289126091).

867378261 is a wasteful number, since it uses less digits than its factorization.

867378261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289126090.

The product of its digits is 677376, while the sum is 48.

The square root of 867378261 is about 29451.2862367673. The cubic root of 867378261 is about 953.6803721156.

The spelling of 867378261 in words is "eight hundred sixty-seven million, three hundred seventy-eight thousand, two hundred sixty-one".