398589137 has 4 divisors (see below), whose sum is σ = 412333620. Its totient is φ = 384844656.

The previous prime is 398589133. The next prime is 398589161. The reversal of 398589137 is 731985893.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 94400656 + 304188481 = 9716^2 + 17441^2 .

It is a cyclic number.

It is not a de Polignac number, because 398589137 - 2² = 398589133 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (398589131) 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, 6872198 + ... + 6872255.

It is an arithmetic number, because the mean of its divisors is an integer number (103083405).

Almost surely, 2^398589137 is an apocalyptic number.

It is an amenable number.

398589137 is a deficient number, since it is larger than the sum of its proper divisors (13744483).

398589137 is a wasteful number, since it uses less digits than its factorization.

398589137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13744482.

The product of its digits is 1632960, while the sum is 53.

The square root of 398589137 is about 19964.6972679277. The cubic root of 398589137 is about 735.9390019401.

The spelling of 398589137 in words is "three hundred ninety-eight million, five hundred eighty-nine thousand, one hundred thirty-seven".