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2691001 is a prime number
BaseRepresentation
bin1010010000111110111001
312001201100201
422100332321
51142103001
6133402201
731605325
oct12207671
95051321
102691001
111578875
12a99361
13732b11
14500985
15382501
hex290fb9

2691001 has 2 divisors, whose sum is σ = 2691002. Its totient is φ = 2691000.

The previous prime is 2690993. The next prime is 2691011. The reversal of 2691001 is 1001962.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2399401 + 291600 = 1549^2 + 540^2 .

It is a cyclic number.

It is not a de Polignac number, because 2691001 - 23 = 2690993 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2691001.

It is not a weakly prime, because it can be changed into another prime (2691011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1345500 + 1345501.

It is an arithmetic number, because the mean of its divisors is an integer number (1345501).

22691001 is an apocalyptic number.

It is an amenable number.

2691001 is a deficient number, since it is larger than the sum of its proper divisors (1).

2691001 is an equidigital number, since it uses as much as digits as its factorization.

2691001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 2691001 is about 1640.4270785378. The cubic root of 2691001 is about 139.0927903802.

Adding to 2691001 its reverse (1001962), we get a palindrome (3692963).

The spelling of 2691001 in words is "two million, six hundred ninety-one thousand, one".