393215965 has 8 divisors (see below), whose sum is σ = 478902240. Its totient is φ = 309877392.

The previous prime is 393215941. The next prime is 393215969. The reversal of 393215965 is 569512393.

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 393215965 - 2⁹ = 393215453 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (393215969) 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, 586555 + ... + 587224.

It is an arithmetic number, because the mean of its divisors is an integer number (59862780).

Almost surely, 2^393215965 is an apocalyptic number.

It is an amenable number.

393215965 is a deficient number, since it is larger than the sum of its proper divisors (85686275).

393215965 is a wasteful number, since it uses less digits than its factorization.

393215965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1173851.

The product of its digits is 218700, while the sum is 43.

The square root of 393215965 is about 19829.6738500662. The cubic root of 393215965 is about 732.6170934975.

The spelling of 393215965 in words is "three hundred ninety-three million, two hundred fifteen thousand, nine hundred sixty-five".