393340279 has 8 divisors (see below), whose sum is σ = 399274992. Its totient is φ = 387420480.

The previous prime is 393340219. The next prime is 393340291. The reversal of 393340279 is 972043393.

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 393340279 - 2⁷ = 393340151 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 (393340219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56652 + ... + 63214.

It is an arithmetic number, because the mean of its divisors is an integer number (49909374).

Almost surely, 2^393340279 is an apocalyptic number.

393340279 is a deficient number, since it is larger than the sum of its proper divisors (5934713).

393340279 is an equidigital number, since it uses as much as digits as its factorization.

393340279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7457.

The product of its (nonzero) digits is 122472, while the sum is 40.

The square root of 393340279 is about 19832.8081471082. The cubic root of 393340279 is about 732.6942902320.

The spelling of 393340279 in words is "three hundred ninety-three million, three hundred forty thousand, two hundred seventy-nine".