397627381 has 8 divisors (see below), whose sum is σ = 429223680. Its totient is φ = 367223472.

The previous prime is 397627369. The next prime is 397627397. The reversal of 397627381 is 183726793.

It is a happy number.

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 397627381 - 2⁹ = 397626869 is a prime.

It is a super-2 number, since 2×397627381² = 316215068241838322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397625381) 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, 297405 + ... + 298738.

It is an arithmetic number, because the mean of its divisors is an integer number (53652960).

Almost surely, 2^397627381 is an apocalyptic number.

It is an amenable number.

397627381 is a deficient number, since it is larger than the sum of its proper divisors (31596299).

397627381 is a wasteful number, since it uses less digits than its factorization.

397627381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 596195.

The product of its digits is 381024, while the sum is 46.

The square root of 397627381 is about 19940.5963050256. The cubic root of 397627381 is about 735.3466093165.

The spelling of 397627381 in words is "three hundred ninety-seven million, six hundred twenty-seven thousand, three hundred eighty-one".