397213841 has 8 divisors (see below), whose sum is σ = 428777280. Its totient is φ = 366841552.

The previous prime is 397213837. The next prime is 397213903. The reversal of 397213841 is 148312793.

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 397213841 - 2² = 397213837 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 397213795 and 397213804.

It is not an unprimeable number, because it can be changed into a prime (397213441) 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, 297095 + ... + 298428.

It is an arithmetic number, because the mean of its divisors is an integer number (53597160).

Almost surely, 2^397213841 is an apocalyptic number.

It is an amenable number.

397213841 is a deficient number, since it is larger than the sum of its proper divisors (31563439).

397213841 is a wasteful number, since it uses less digits than its factorization.

397213841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 595575.

The product of its digits is 36288, while the sum is 38.

The square root of 397213841 is about 19930.2243088230. The cubic root of 397213841 is about 735.0915960940.

The spelling of 397213841 in words is "three hundred ninety-seven million, two hundred thirteen thousand, eight hundred forty-one".