2991723001 has 2 divisors, whose sum is σ = 2991723002. Its totient is φ = 2991723000.

The previous prime is 2991722977. The next prime is 2991723013. The reversal of 2991723001 is 1003271992.

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., 2525163001 + 466560000 = 50251^2 + 21600^2 .

It is a cyclic number.

It is not a de Polignac number, because 2991723001 - 2²⁵ = 2958168569 is a prime.

It is not a weakly prime, because it can be changed into another prime (2991723401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1495861500 + 1495861501.

It is an arithmetic number, because the mean of its divisors is an integer number (1495861501).

Almost surely, 2^2991723001 is an apocalyptic number.

It is an amenable number.

2991723001 is a deficient number, since it is larger than the sum of its proper divisors (1).

2991723001 is an equidigital number, since it uses as much as digits as its factorization.

2991723001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6804, while the sum is 34.

The square root of 2991723001 is about 54696.6452444755. The cubic root of 2991723001 is about 1440.9219599043.

Adding to 2991723001 its reverse (1003271992), we get a palindrome (3994994993).

The spelling of 2991723001 in words is "two billion, nine hundred ninety-one million, seven hundred twenty-three thousand, one".