391037201 has 8 divisors (see below), whose sum is σ = 403281384. Its totient is φ = 378881280.

The previous prime is 391037183. The next prime is 391037203. The reversal of 391037201 is 102730193.

It can be written as a sum of positive squares in 4 ways, for example, as 105596176 + 285441025 = 10276^2 + 16895^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 391037201 - 2²⁶ = 323928337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (391037203) 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 7 ways as a sum of consecutive naturals, for example, 13010 + ... + 30843.

It is an arithmetic number, because the mean of its divisors is an integer number (50410173).

Almost surely, 2^391037201 is an apocalyptic number.

It is an amenable number.

391037201 is a deficient number, since it is larger than the sum of its proper divisors (12244183).

391037201 is a wasteful number, since it uses less digits than its factorization.

391037201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44131.

The product of its (nonzero) digits is 1134, while the sum is 26.

The square root of 391037201 is about 19774.6605786294. The cubic root of 391037201 is about 731.2614712107.

Adding to 391037201 its reverse (102730193), we get a palindrome (493767394).

The spelling of 391037201 in words is "three hundred ninety-one million, thirty-seven thousand, two hundred one".