670439563 has 4 divisors (see below), whose sum is σ = 670859928. Its totient is φ = 670019200.

The previous prime is 670439551. The next prime is 670439579. The reversal of 670439563 is 365934076.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 670439563 - 2²⁵ = 636885131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (670439533) 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, 207781 + ... + 210982.

It is an arithmetic number, because the mean of its divisors is an integer number (167714982).

Almost surely, 2^670439563 is an apocalyptic number.

670439563 is a deficient number, since it is larger than the sum of its proper divisors (420365).

670439563 is a wasteful number, since it uses less digits than its factorization.

670439563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420364.

The product of its (nonzero) digits is 408240, while the sum is 43.

The square root of 670439563 is about 25892.8477190131. The cubic root of 670439563 is about 875.2253299409.

The spelling of 670439563 in words is "six hundred seventy million, four hundred thirty-nine thousand, five hundred sixty-three".