670942489 has 16 divisors (see below), whose sum is σ = 788937088. Its totient is φ = 558721152.

The previous prime is 670942487. The next prime is 670942507. The reversal of 670942489 is 984249076.

It is a cyclic number.

It is not a de Polignac number, because 670942489 - 2¹ = 670942487 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (670942487) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24439 + ... + 44035.

It is an arithmetic number, because the mean of its divisors is an integer number (49308568).

Almost surely, 2^670942489 is an apocalyptic number.

It is an amenable number.

670942489 is a deficient number, since it is larger than the sum of its proper divisors (117994599).

670942489 is a wasteful number, since it uses less digits than its factorization.

670942489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19744.

The product of its (nonzero) digits is 870912, while the sum is 49.

The square root of 670942489 is about 25902.5575764248. The cubic root of 670942489 is about 875.4441234906. Note that the first 3 decimals are identical.

The spelling of 670942489 in words is "six hundred seventy million, nine hundred forty-two thousand, four hundred eighty-nine".