8864787409 has 3 divisors (see below), whose sum is σ = 8864881563. Its totient is φ = 8864693256.

The previous prime is 8864787401. The next prime is 8864787419. The reversal of 8864787409 is 9047874688.

The square root of 8864787409 is 94153.

It is a perfect power (a square), and thus also a powerful number.

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 can be written as a sum of positive squares in only one way, i.e., 3517083025 + 5347704384 = 59305^2 + 73128^2 .

It is not a de Polignac number, because 8864787409 - 2³ = 8864787401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8864787401) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 47077 + ... + 141229.

It is an arithmetic number, because the mean of its divisors is an integer number (2954960521).

Almost surely, 2^8864787409 is an apocalyptic number.

8864787409 is the 94153-rd square number.

8864787409 is the 47077-th centered octagonal number.

It is an amenable number.

8864787409 is a deficient number, since it is larger than the sum of its proper divisors (94154).

8864787409 is an frugal number, since it uses more digits than its factorization.

8864787409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188306 (or 94153 counting only the distinct ones).

The product of its (nonzero) digits is 21676032, while the sum is 61.

The cubic root of 8864787409 is about 2069.6144200802.

The spelling of 8864787409 in words is "eight billion, eight hundred sixty-four million, seven hundred eighty-seven thousand, four hundred nine".