397773643 has 8 divisors (see below), whose sum is σ = 417218112. Its totient is φ = 378786816.

The previous prime is 397773631. The next prime is 397773647. The reversal of 397773643 is 346377793.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-397773643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (397773647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112630 + ... + 116107.

It is an arithmetic number, because the mean of its divisors is an integer number (52152264).

Almost surely, 2^397773643 is an apocalyptic number.

397773643 is a deficient number, since it is larger than the sum of its proper divisors (19444469).

397773643 is a wasteful number, since it uses less digits than its factorization.

397773643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228821.

The product of its digits is 2000376, while the sum is 49.

The square root of 397773643 is about 19944.2634108157. The cubic root of 397773643 is about 735.4367607885.

The spelling of 397773643 in words is "three hundred ninety-seven million, seven hundred seventy-three thousand, six hundred forty-three".