396979841 has 4 divisors (see below), whose sum is σ = 397597872. Its totient is φ = 396361812.

The previous prime is 396979837. The next prime is 396979861. The reversal of 396979841 is 148979693.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 148979693 = 241 ⋅618173.

It is a cyclic number.

It is not a de Polignac number, because 396979841 - 2² = 396979837 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (396979861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 308051 + ... + 309336.

It is an arithmetic number, because the mean of its divisors is an integer number (99399468).

Almost surely, 2^396979841 is an apocalyptic number.

It is an amenable number.

396979841 is a deficient number, since it is larger than the sum of its proper divisors (618031).

396979841 is an equidigital number, since it uses as much as digits as its factorization.

396979841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 618030.

The product of its digits is 2939328, while the sum is 56.

The square root of 396979841 is about 19924.3529631454. The cubic root of 396979841 is about 734.9472194348.

The spelling of 396979841 in words is "three hundred ninety-six million, nine hundred seventy-nine thousand, eight hundred forty-one".