397013779 has 4 divisors (see below), whose sum is σ = 397065280. Its totient is φ = 396962280.

The previous prime is 397013777. The next prime is 397013821. The reversal of 397013779 is 977310793.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 977310793 = 97 ⋅10075369.

It is a cyclic number.

It is not a de Polignac number, because 397013779 - 2¹ = 397013777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (397013777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11592 + ... + 30469.

It is an arithmetic number, because the mean of its divisors is an integer number (99266320).

Almost surely, 2^397013779 is an apocalyptic number.

397013779 is a deficient number, since it is larger than the sum of its proper divisors (51501).

397013779 is an equidigital number, since it uses as much as digits as its factorization.

397013779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51500.

The product of its (nonzero) digits is 250047, while the sum is 46.

The square root of 397013779 is about 19925.2046162643. The cubic root of 397013779 is about 734.9681625033.

The spelling of 397013779 in words is "three hundred ninety-seven million, thirteen thousand, seven hundred seventy-nine".