683456449 has 9 divisors (see below), whose sum is σ = 740442339. Its totient is φ = 630569160.

The previous prime is 683456447. The next prime is 683456483. The reversal of 683456449 is 944654386.

The square root of 683456449 is 26143.

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

It can be written as a sum of positive squares in only one way, i.e., 101103025 + 582353424 = 10055^2 + 24132^2 .

It is not a de Polignac number, because 683456449 - 2¹ = 683456447 is a prime.

It is a super-2 number, since 2×683456449² = 934225435359379202, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (683456447) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 338854 + ... + 340864.

It is an arithmetic number, because the mean of its divisors is an integer number (82271371).

Almost surely, 2^683456449 is an apocalyptic number.

683456449 is the 26143-rd square number.

683456449 is the 13072-nd centered octagonal number.

It is an amenable number.

683456449 is a deficient number, since it is larger than the sum of its proper divisors (56985890).

683456449 is an frugal number, since it uses more digits than its factorization.

683456449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4048 (or 2024 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 49.

The cubic root of 683456449 is about 880.8533599644.

Multiplying 683456449 by its sum of digits (49), we get a square (33489366001 = 183001²).

The spelling of 683456449 in words is "six hundred eighty-three million, four hundred fifty-six thousand, four hundred forty-nine".