397842623 has 8 divisors (see below), whose sum is σ = 411017856. Its totient is φ = 384688800.

The previous prime is 397842617. The next prime is 397842637. The reversal of 397842623 is 326248793.

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 397842623 - 2²⁴ = 381065407 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397842223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38165 + ... + 47457.

It is an arithmetic number, because the mean of its divisors is an integer number (51377232).

Almost surely, 2^397842623 is an apocalyptic number.

397842623 is a deficient number, since it is larger than the sum of its proper divisors (13175233).

397842623 is a wasteful number, since it uses less digits than its factorization.

397842623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10705.

The product of its digits is 435456, while the sum is 44.

The square root of 397842623 is about 19945.9926551676. The cubic root of 397842623 is about 735.4792703049.

The spelling of 397842623 in words is "three hundred ninety-seven million, eight hundred forty-two thousand, six hundred twenty-three".