397130919 has 4 divisors (see below), whose sum is σ = 529507896. Its totient is φ = 264753944.

The previous prime is 397130917. The next prime is 397130933. The reversal of 397130919 is 919031793.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 919031793 = 3 ⋅306343931.

It is a cyclic number.

It is not a de Polignac number, because 397130919 - 2¹ = 397130917 is a prime.

It is a super-2 number, since 2×397130919² = 315425933651569122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397130911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66188484 + ... + 66188489.

It is an arithmetic number, because the mean of its divisors is an integer number (132376974).

Almost surely, 2^397130919 is an apocalyptic number.

397130919 is a deficient number, since it is larger than the sum of its proper divisors (132376977).

397130919 is a wasteful number, since it uses less digits than its factorization.

397130919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132376976.

The product of its (nonzero) digits is 45927, while the sum is 42.

The square root of 397130919 is about 19928.1438924954. The cubic root of 397130919 is about 735.0404401832.

The spelling of 397130919 in words is "three hundred ninety-seven million, one hundred thirty thousand, nine hundred nineteen".