397598849 has 4 divisors (see below), whose sum is σ = 401459136. Its totient is φ = 393738564.

The previous prime is 397598843. The next prime is 397598933. The reversal of 397598849 is 948895793.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 948895793 = 7457 ⋅127249.

It is a cyclic number.

It is not a de Polignac number, because 397598849 - 2⁴ = 397598833 is a prime.

It is a super-2 number, since 2×397598849² = 316169689452249602, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 397598791 and 397598800.

It is not an unprimeable number, because it can be changed into a prime (397598843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1929989 + ... + 1930194.

It is an arithmetic number, because the mean of its divisors is an integer number (100364784).

Almost surely, 2^397598849 is an apocalyptic number.

It is an amenable number.

397598849 is a deficient number, since it is larger than the sum of its proper divisors (3860287).

397598849 is a wasteful number, since it uses less digits than its factorization.

397598849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3860286.

The product of its digits is 19595520, while the sum is 62.

The square root of 397598849 is about 19939.8808672469. The cubic root of 397598849 is about 735.3290204781.

The spelling of 397598849 in words is "three hundred ninety-seven million, five hundred ninety-eight thousand, eight hundred forty-nine".