397249126 has 4 divisors (see below), whose sum is σ = 595873692. Its totient is φ = 198624562.

The previous prime is 397249117. The next prime is 397249129. The reversal of 397249126 is 621942793.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 621942793 = 23 ⋅27040991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397249129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99312280 + ... + 99312283.

It is an arithmetic number, because the mean of its divisors is an integer number (148968423).

Almost surely, 2^397249126 is an apocalyptic number.

397249126 is a deficient number, since it is larger than the sum of its proper divisors (198624566).

397249126 is a wasteful number, since it uses less digits than its factorization.

397249126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198624565.

The product of its digits is 163296, while the sum is 43.

The square root of 397249126 is about 19931.1095024838. The cubic root of 397249126 is about 735.1133618167.

The spelling of 397249126 in words is "three hundred ninety-seven million, two hundred forty-nine thousand, one hundred twenty-six".