391002201 has 16 divisors (see below), whose sum is σ = 582016320. Its totient is φ = 259428960.

The previous prime is 391002191. The next prime is 391002203. The reversal of 391002201 is 102200193.

It is a happy number.

It is not a de Polignac number, because 391002201 - 2⁶ = 391002137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (391002203) 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, 28620 + ... + 40013.

It is an arithmetic number, because the mean of its divisors is an integer number (36376020).

Almost surely, 2^391002201 is an apocalyptic number.

It is an amenable number.

391002201 is a deficient number, since it is larger than the sum of its proper divisors (191014119).

391002201 is a wasteful number, since it uses less digits than its factorization.

391002201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68853 (or 68847 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 391002201 is about 19773.7755878841. The cubic root of 391002201 is about 731.2396532395.

Adding to 391002201 its reverse (102200193), we get a palindrome (493202394).

The spelling of 391002201 in words is "three hundred ninety-one million, two thousand, two hundred one".