398279589 has 4 divisors (see below), whose sum is σ = 531039456. Its totient is φ = 265519724.

The previous prime is 398279513. The next prime is 398279597. The reversal of 398279589 is 985972893.

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.

It is a cyclic number.

It is not a de Polignac number, because 398279589 - 2⁸ = 398279333 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398279509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66379929 + ... + 66379934.

It is an arithmetic number, because the mean of its divisors is an integer number (132759864).

Almost surely, 2^398279589 is an apocalyptic number.

It is an amenable number.

398279589 is a deficient number, since it is larger than the sum of its proper divisors (132759867).

398279589 is a wasteful number, since it uses less digits than its factorization.

398279589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132759866.

The product of its digits is 9797760, while the sum is 60.

The square root of 398279589 is about 19956.9433781829. The cubic root of 398279589 is about 735.7484402621.

The spelling of 398279589 in words is "three hundred ninety-eight million, two hundred seventy-nine thousand, five hundred eighty-nine".