439698197 has 4 divisors (see below), whose sum is σ = 441976620. Its totient is φ = 437419776.

The previous prime is 439698191. The next prime is 439698221. The reversal of 439698197 is 791896934.

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 278255761 + 161442436 = 16681^2 + 12706^2 .

It is a cyclic number.

It is not a de Polignac number, because 439698197 - 2¹⁴ = 439681813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (439698191) 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, 1138922 + ... + 1139307.

It is an arithmetic number, because the mean of its divisors is an integer number (110494155).

Almost surely, 2^439698197 is an apocalyptic number.

It is an amenable number.

439698197 is a deficient number, since it is larger than the sum of its proper divisors (2278423).

439698197 is a wasteful number, since it uses less digits than its factorization.

439698197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2278422.

The product of its digits is 2939328, while the sum is 56.

The square root of 439698197 is about 20968.9817826236. The cubic root of 439698197 is about 760.4165520038.

The spelling of 439698197 in words is "four hundred thirty-nine million, six hundred ninety-eight thousand, one hundred ninety-seven".