393961693 has 8 divisors (see below), whose sum is σ = 396864000. Its totient is φ = 391069008.

The previous prime is 393961691. The next prime is 393961697. The reversal of 393961693 is 396169393.

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 393961693 - 2¹ = 393961691 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (393961691) 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, 93255 + ... + 97387.

It is an arithmetic number, because the mean of its divisors is an integer number (49608000).

Almost surely, 2^393961693 is an apocalyptic number.

It is an amenable number.

393961693 is a deficient number, since it is larger than the sum of its proper divisors (2902307).

393961693 is a wasteful number, since it uses less digits than its factorization.

393961693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4811.

The product of its digits is 708588, while the sum is 49.

The square root of 393961693 is about 19848.4682784340. The cubic root of 393961693 is about 733.0799333626.

The spelling of 393961693 in words is "three hundred ninety-three million, nine hundred sixty-one thousand, six hundred ninety-three".