393791659946 has 4 divisors (see below), whose sum is σ = 590687489922. Its totient is φ = 196895829972.

The previous prime is 393791659931. The next prime is 393791659967. The reversal of 393791659946 is 649956197393.

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

It can be written as a sum of positive squares in only one way, i.e., 386380344025 + 7411315921 = 621595^2 + 86089^2 .

It is a super-2 number, since 2×393791659946² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 393791659946.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98447914985 + ... + 98447914988.

Almost surely, 2^393791659946 is an apocalyptic number.

393791659946 is a deficient number, since it is larger than the sum of its proper divisors (196895829976).

393791659946 is a wasteful number, since it uses less digits than its factorization.

393791659946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196895829975.

The product of its digits is 297606960, while the sum is 71.

The spelling of 393791659946 in words is "three hundred ninety-three billion, seven hundred ninety-one million, six hundred fifty-nine thousand, nine hundred forty-six".