864601949 has 4 divisors (see below), whose sum is σ = 864678720. Its totient is φ = 864525180.

The previous prime is 864601943. The next prime is 864601957. The reversal of 864601949 is 949106468.

It is a happy number.

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, 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 864601949 - 2⁸ = 864601693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (864601943) 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, 17819 + ... + 45240.

It is an arithmetic number, because the mean of its divisors is an integer number (216169680).

Almost surely, 2^864601949 is an apocalyptic number.

It is an amenable number.

864601949 is a deficient number, since it is larger than the sum of its proper divisors (76771).

864601949 is a wasteful number, since it uses less digits than its factorization.

864601949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76770.

The product of its (nonzero) digits is 373248, while the sum is 47.

The square root of 864601949 is about 29404.1144910028. The cubic root of 864601949 is about 952.6617683695.

The spelling of 864601949 in words is "eight hundred sixty-four million, six hundred one thousand, nine hundred forty-nine".