397421422 has 4 divisors (see below), whose sum is σ = 596132136. Its totient is φ = 198710710.

The previous prime is 397421419. The next prime is 397421447. The reversal of 397421422 is 224124793.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99355354 + ... + 99355357.

It is an arithmetic number, because the mean of its divisors is an integer number (149033034).

Almost surely, 2^397421422 is an apocalyptic number.

397421422 is a deficient number, since it is larger than the sum of its proper divisors (198710714).

397421422 is a wasteful number, since it uses less digits than its factorization.

397421422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198710713.

The product of its digits is 24192, while the sum is 34.

The square root of 397421422 is about 19935.4313221460. The cubic root of 397421422 is about 735.2196249285.

The spelling of 397421422 in words is "three hundred ninety-seven million, four hundred twenty-one thousand, four hundred twenty-two".