1001031601 has 2 divisors, whose sum is σ = 1001031602. Its totient is φ = 1001031600.

The previous prime is 1001031589. The next prime is 1001031607. The reversal of 1001031601 is 1061301001.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 981882225 + 19149376 = 31335^2 + 4376^2 .

It is a cyclic number.

It is not a de Polignac number, because 1001031601 - 2⁵ = 1001031569 is a prime.

It is not a weakly prime, because it can be changed into another prime (1001031607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500515800 + 500515801.

It is an arithmetic number, because the mean of its divisors is an integer number (500515801).

Almost surely, 2^1001031601 is an apocalyptic number.

It is an amenable number.

1001031601 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001031601 is an equidigital number, since it uses as much as digits as its factorization.

1001031601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 1001031601 is about 31639.0834412124. The cubic root of 1001031601 is about 1000.3437488232.

Adding to 1001031601 its reverse (1061301001), we get a palindrome (2062332602).

The spelling of 1001031601 in words is "one billion, one million, thirty-one thousand, six hundred one".