863774189 has 4 divisors (see below), whose sum is σ = 865640256. Its totient is φ = 861908124.

The previous prime is 863774167. The next prime is 863774201. The reversal of 863774189 is 981477368.

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 863774189 - 2¹² = 863770093 is a prime.

It is a super-2 number, since 2×863774189² = 1492211699165215442, which contains 22 as substring.

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 863774189.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (863774129) 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, 932339 + ... + 933264.

It is an arithmetic number, because the mean of its divisors is an integer number (216410064).

Almost surely, 2^863774189 is an apocalyptic number.

It is an amenable number.

863774189 is a deficient number, since it is larger than the sum of its proper divisors (1866067).

863774189 is a wasteful number, since it uses less digits than its factorization.

863774189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1866066.

The product of its digits is 2032128, while the sum is 53.

The square root of 863774189 is about 29390.0355392776. The cubic root of 863774189 is about 952.3576488079.

The spelling of 863774189 in words is "eight hundred sixty-three million, seven hundred seventy-four thousand, one hundred eighty-nine".