670988491 has 8 divisors (see below), whose sum is σ = 675651200. Its totient is φ = 666340992.

The previous prime is 670988441. The next prime is 670988503. The reversal of 670988491 is 194889076.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 670988491 - 2²⁹ = 134117579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (670988431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93085 + ... + 100033.

It is an arithmetic number, because the mean of its divisors is an integer number (84456400).

Almost surely, 2^670988491 is an apocalyptic number.

670988491 is a deficient number, since it is larger than the sum of its proper divisors (4662709).

670988491 is a wasteful number, since it uses less digits than its factorization.

670988491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7605.

The product of its (nonzero) digits is 870912, while the sum is 52.

The square root of 670988491 is about 25903.4455430161. The cubic root of 670988491 is about 875.4641307992.

The spelling of 670988491 in words is "six hundred seventy million, nine hundred eighty-eight thousand, four hundred ninety-one".