2001387601 has 2 divisors, whose sum is σ = 2001387602. Its totient is φ = 2001387600.

The previous prime is 2001387593. The next prime is 2001387649. The reversal of 2001387601 is 1067831002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1396965376 + 604422225 = 37376^2 + 24585^2 .

It is a cyclic number.

It is not a de Polignac number, because 2001387601 - 2³ = 2001387593 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2001387601.

It is not a weakly prime, because it can be changed into another prime (2001387671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000693800 + 1000693801.

It is an arithmetic number, because the mean of its divisors is an integer number (1000693801).

Almost surely, 2^2001387601 is an apocalyptic number.

It is an amenable number.

2001387601 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001387601 is an equidigital number, since it uses as much as digits as its factorization.

2001387601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 2001387601 is about 44736.8707108577. The cubic root of 2001387601 is about 1260.2123604862.

The spelling of 2001387601 in words is "two billion, one million, three hundred eighty-seven thousand, six hundred one".