671969257 has 8 divisors (see below), whose sum is σ = 707640800. Its totient is φ = 636328224.

The previous prime is 671969239. The next prime is 671969279. The reversal of 671969257 is 752969176.

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 a de Polignac number, because none of the positive numbers 2^k-671969257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (671969297) 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, 48094 + ... + 60472.

It is an arithmetic number, because the mean of its divisors is an integer number (88455100).

Almost surely, 2^671969257 is an apocalyptic number.

It is an amenable number.

671969257 is a deficient number, since it is larger than the sum of its proper divisors (35671543).

671969257 is a wasteful number, since it uses less digits than its factorization.

671969257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15255.

The product of its digits is 1428840, while the sum is 52.

The square root of 671969257 is about 25922.3698183634. The cubic root of 671969257 is about 875.8904706750.

The spelling of 671969257 in words is "six hundred seventy-one million, nine hundred sixty-nine thousand, two hundred fifty-seven".