671609942 has 8 divisors (see below), whose sum is σ = 1009620696. Its totient is φ = 335069712.

The previous prime is 671609941. The next prime is 671609989. The reversal of 671609942 is 249906176.

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

It is a junction number, because it is equal to n+sod(n) for n = 671609893 and 671609902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671609941) 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, 366488 + ... + 368315.

It is an arithmetic number, because the mean of its divisors is an integer number (126202587).

Almost surely, 2^671609942 is an apocalyptic number.

671609942 is a deficient number, since it is larger than the sum of its proper divisors (338010754).

671609942 is a wasteful number, since it uses less digits than its factorization.

671609942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 735262.

The product of its (nonzero) digits is 163296, while the sum is 44.

The square root of 671609942 is about 25915.4382945765. The cubic root of 671609942 is about 875.7343242970.

The spelling of 671609942 in words is "six hundred seventy-one million, six hundred nine thousand, nine hundred forty-two".