201670439 has 16 divisors (see below), whose sum is σ = 217061856. Its totient is φ = 186700800.

The previous prime is 201670433. The next prime is 201670471. The reversal of 201670439 is 934076102.

201670439 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-201670439 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 (201670433) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 304769 + ... + 305429.

It is an arithmetic number, because the mean of its divisors is an integer number (13566366).

Almost surely, 2^201670439 is an apocalyptic number.

201670439 is a deficient number, since it is larger than the sum of its proper divisors (15391417).

201670439 is a wasteful number, since it uses less digits than its factorization.

With its successor (201670440) it forms an eRAP, since the sums of their prime factors are consecutive (946 and 947).

201670439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 946.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 201670439 is about 14201.0717553289. The cubic root of 201670439 is about 586.4271668250.

The spelling of 201670439 in words is "two hundred one million, six hundred seventy thousand, four hundred thirty-nine".