864381577 has 4 divisors (see below), whose sum is σ = 864528256. Its totient is φ = 864234900.

The previous prime is 864381527. The next prime is 864381613. The reversal of 864381577 is 775183468.

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.

It is a cyclic number.

It is not a de Polignac number, because 864381577 - 2¹⁹ = 863857289 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 864381577.

It is not an unprimeable number, because it can be changed into a prime (864381517) 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, 64113 + ... + 76414.

It is an arithmetic number, because the mean of its divisors is an integer number (216132064).

Almost surely, 2^864381577 is an apocalyptic number.

It is an amenable number.

864381577 is a deficient number, since it is larger than the sum of its proper divisors (146679).

864381577 is a wasteful number, since it uses less digits than its factorization.

864381577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146678.

The product of its digits is 1128960, while the sum is 49.

The square root of 864381577 is about 29400.3669534923. The cubic root of 864381577 is about 952.5808225197.

The spelling of 864381577 in words is "eight hundred sixty-four million, three hundred eighty-one thousand, five hundred seventy-seven".