397189634 has 4 divisors (see below), whose sum is σ = 595784454. Its totient is φ = 198594816.

The previous prime is 397189633. The next prime is 397189687. The reversal of 397189634 is 436981793.

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

It can be written as a sum of positive squares in only one way, i.e., 217710025 + 179479609 = 14755^2 + 13397^2 .

It is not an unprimeable number, because it can be changed into a prime (397189633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99297407 + ... + 99297410.

Almost surely, 2^397189634 is an apocalyptic number.

397189634 is a deficient number, since it is larger than the sum of its proper divisors (198594820).

397189634 is a wasteful number, since it uses less digits than its factorization.

397189634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198594819.

The product of its digits is 979776, while the sum is 50.

The square root of 397189634 is about 19929.6170058534. The cubic root of 397189634 is about 735.0766631436.

The spelling of 397189634 in words is "three hundred ninety-seven million, one hundred eighty-nine thousand, six hundred thirty-four".