1659943942 has 4 divisors (see below), whose sum is σ = 2489915916. Its totient is φ = 829971970.

The previous prime is 1659943931. The next prime is 1659943951. The reversal of 1659943942 is 2493499561.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1659943942.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 414985984 + ... + 414985987.

It is an arithmetic number, because the mean of its divisors is an integer number (622478979).

Almost surely, 2^1659943942 is an apocalyptic number.

1659943942 is a deficient number, since it is larger than the sum of its proper divisors (829971974).

1659943942 is an equidigital number, since it uses as much as digits as its factorization.

1659943942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 829971973.

The product of its digits is 2099520, while the sum is 52.

The square root of 1659943942 is about 40742.4096243705. The cubic root of 1659943942 is about 1184.0348190051.

The spelling of 1659943942 in words is "one billion, six hundred fifty-nine million, nine hundred forty-three thousand, nine hundred forty-two".