397081943 has 4 divisors (see below), whose sum is σ = 398495328. Its totient is φ = 395668560.

The previous prime is 397081901. The next prime is 397081987. The reversal of 397081943 is 349180793.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 397081943 - 2¹⁸ = 396819799 is a prime.

It is a super-4 number, since 4×397081943⁴ (a number of 35 digits) contains 4444 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 397081894 and 397081903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397084943) 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, 706271 + ... + 706832.

It is an arithmetic number, because the mean of its divisors is an integer number (99623832).

Almost surely, 2^397081943 is an apocalyptic number.

397081943 is a deficient number, since it is larger than the sum of its proper divisors (1413385).

397081943 is a wasteful number, since it uses less digits than its factorization.

397081943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1413384.

The product of its (nonzero) digits is 163296, while the sum is 44.

The square root of 397081943 is about 19926.9150397145. The cubic root of 397081943 is about 735.0102227588.

The spelling of 397081943 in words is "three hundred ninety-seven million, eighty-one thousand, nine hundred forty-three".