397138622 has 4 divisors (see below), whose sum is σ = 595707936. Its totient is φ = 198569310.

The previous prime is 397138619. The next prime is 397138663. The reversal of 397138622 is 226831793.

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

It is a self number, because there is not a number n which added to its sum of digits gives 397138622.

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, 99284654 + ... + 99284657.

It is an arithmetic number, because the mean of its divisors is an integer number (148926984).

Almost surely, 2^397138622 is an apocalyptic number.

397138622 is a deficient number, since it is larger than the sum of its proper divisors (198569314).

397138622 is a wasteful number, since it uses less digits than its factorization.

397138622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198569313.

The product of its digits is 108864, while the sum is 41.

The square root of 397138622 is about 19928.3371609374. The cubic root of 397138622 is about 735.0451925873.

The spelling of 397138622 in words is "three hundred ninety-seven million, one hundred thirty-eight thousand, six hundred twenty-two".