31840001 has 2 divisors, whose sum is σ = 31840002. Its totient is φ = 31840000.

The previous prime is 31839989. The next prime is 31840013. The reversal of 31840001 is 10004813.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (31839989) and next prime (31840013).

It can be written as a sum of positive squares in only one way, i.e., 31091776 + 748225 = 5576^2 + 865^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31840001 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (31840051) 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 as a sum of consecutive naturals, namely, 15920000 + 15920001.

It is an arithmetic number, because the mean of its divisors is an integer number (15920001).

Almost surely, 2^31840001 is an apocalyptic number.

It is an amenable number.

31840001 is a deficient number, since it is larger than the sum of its proper divisors (1).

31840001 is an equidigital number, since it uses as much as digits as its factorization.

31840001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 31840001 is about 5642.6944804765. The cubic root of 31840001 is about 316.9501956804.

Adding to 31840001 its reverse (10004813), we get a palindrome (41844814).

The spelling of 31840001 in words is "thirty-one million, eight hundred forty thousand, one".