864419291 has 4 divisors (see below), whose sum is σ = 864482112. Its totient is φ = 864356472.

The previous prime is 864419287. The next prime is 864419317. The reversal of 864419291 is 192914468.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 864419291 - 2² = 864419287 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (864419261) 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, 875 + ... + 41588.

It is an arithmetic number, because the mean of its divisors is an integer number (216120528).

Almost surely, 2^864419291 is an apocalyptic number.

864419291 is the 15716-th centered heptagonal number.

864419291 is a deficient number, since it is larger than the sum of its proper divisors (62821).

864419291 is a wasteful number, since it uses less digits than its factorization.

864419291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62820.

The product of its digits is 124416, while the sum is 44.

The square root of 864419291 is about 29401.0083330487. The cubic root of 864419291 is about 952.5946763977.

The spelling of 864419291 in words is "eight hundred sixty-four million, four hundred nineteen thousand, two hundred ninety-one".