3891201001 has 2 divisors, whose sum is σ = 3891201002. Its totient is φ = 3891201000.

The previous prime is 3891200921. The next prime is 3891201029. The reversal of 3891201001 is 1001021983.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3757567401 + 133633600 = 61299^2 + 11560^2 .

It is a cyclic number.

It is not a de Polignac number, because 3891201001 - 2¹¹ = 3891198953 is a prime.

It is not a weakly prime, because it can be changed into another prime (3891201031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1945600500 + 1945600501.

It is an arithmetic number, because the mean of its divisors is an integer number (1945600501).

Almost surely, 2^3891201001 is an apocalyptic number.

It is an amenable number.

3891201001 is a deficient number, since it is larger than the sum of its proper divisors (1).

3891201001 is an equidigital number, since it uses as much as digits as its factorization.

3891201001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 25.

The square root of 3891201001 is about 62379.4918302482. The cubic root of 3891201001 is about 1572.8762508591.

Adding to 3891201001 its reverse (1001021983), we get a palindrome (4892222984).

The spelling of 3891201001 in words is "three billion, eight hundred ninety-one million, two hundred one thousand, one".