861387449 has 8 divisors (see below), whose sum is σ = 930455232. Its totient is φ = 792720720.

The previous prime is 861387427. The next prime is 861387463. The reversal of 861387449 is 944783168.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 861387449 - 2¹⁶ = 861321913 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 861387397 and 861387406.

It is not an unprimeable number, because it can be changed into a prime (861387419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95789 + ... + 104394.

It is an arithmetic number, because the mean of its divisors is an integer number (116306904).

Almost surely, 2^861387449 is an apocalyptic number.

It is an amenable number.

861387449 is a deficient number, since it is larger than the sum of its proper divisors (69067783).

861387449 is a wasteful number, since it uses less digits than its factorization.

861387449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200527.

The product of its digits is 1161216, while the sum is 50.

The square root of 861387449 is about 29349.4028729717. The cubic root of 861387449 is about 951.4796697713.

The spelling of 861387449 in words is "eight hundred sixty-one million, three hundred eighty-seven thousand, four hundred forty-nine".