670861589 has 4 divisors (see below), whose sum is σ = 671111040. Its totient is φ = 670612140.

The previous prime is 670861579. The next prime is 670861613. The reversal of 670861589 is 985168076.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 670861589 - 2¹⁶ = 670796053 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (670861549) 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, 120647 + ... + 126084.

It is an arithmetic number, because the mean of its divisors is an integer number (167777760).

Almost surely, 2^670861589 is an apocalyptic number.

It is an amenable number.

670861589 is a deficient number, since it is larger than the sum of its proper divisors (249451).

670861589 is a wasteful number, since it uses less digits than its factorization.

670861589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249450.

The product of its (nonzero) digits is 725760, while the sum is 50.

The square root of 670861589 is about 25900.9959074936. The cubic root of 670861589 is about 875.4089360354.

The spelling of 670861589 in words is "six hundred seventy million, eight hundred sixty-one thousand, five hundred eighty-nine".