8091001 has 2 divisors, whose sum is σ = 8091002. Its totient is φ = 8091000.

The previous prime is 8090993. The next prime is 8091007. The reversal of 8091001 is 1001908.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7840000 + 251001 = 2800^2 + 501^2 .

It is a cyclic number.

It is not a de Polignac number, because 8091001 - 2³ = 8090993 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8091001.

It is not a weakly prime, because it can be changed into another prime (8091007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4045500 + 4045501.

It is an arithmetic number, because the mean of its divisors is an integer number (4045501).

Almost surely, 2^8091001 is an apocalyptic number.

It is an amenable number.

8091001 is a deficient number, since it is larger than the sum of its proper divisors (1).

8091001 is an equidigital number, since it uses as much as digits as its factorization.

8091001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 19.

The square root of 8091001 is about 2844.4684916518. The cubic root of 8091001 is about 200.7554842908.

Adding to 8091001 its reverse (1001908), we get a palindrome (9092909).

The spelling of 8091001 in words is "eight million, ninety-one thousand, one".