670447449 has 63 divisors (see below), whose sum is σ = 1177925007. Its totient is φ = 380316384.

The previous prime is 670447439. The next prime is 670447499. The reversal of 670447449 is 944744076.

The square root of 670447449 is 25893.

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., 393824025 + 276623424 = 19845^2 + 16632^2 .

It is a tau number, because it is divible by the number of its divisors (63).

It is not a de Polignac number, because 670447449 - 2²⁵ = 636893017 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (670447409) 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 62 ways as a sum of consecutive naturals, for example, 4893709 + ... + 4893845.

Almost surely, 2^670447449 is an apocalyptic number.

670447449 is the 25893-rd square number.

670447449 is the 12947-th centered octagonal number.

It is an amenable number.

670447449 is a deficient number, since it is larger than the sum of its proper divisors (507477558).

670447449 is an frugal number, since it uses more digits than its factorization.

670447449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306 (or 147 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 45.

The cubic root of 670447449 is about 875.2287615203.

The spelling of 670447449 in words is "six hundred seventy million, four hundred forty-seven thousand, four hundred forty-nine".