8001772901 has 2 divisors, whose sum is σ = 8001772902. Its totient is φ = 8001772900.

The previous prime is 8001772897. The next prime is 8001772903. The reversal of 8001772901 is 1092771008.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7259210401 + 742562500 = 85201^2 + 27250^2 .

It is a cyclic number.

It is not a de Polignac number, because 8001772901 - 2² = 8001772897 is a prime.

Together with 8001772903, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8001772903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4000886450 + 4000886451.

It is an arithmetic number, because the mean of its divisors is an integer number (4000886451).

Almost surely, 2^8001772901 is an apocalyptic number.

It is an amenable number.

8001772901 is a deficient number, since it is larger than the sum of its proper divisors (1).

8001772901 is an equidigital number, since it uses as much as digits as its factorization.

8001772901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7056, while the sum is 35.

The square root of 8001772901 is about 89452.6293688453. The cubic root of 8001772901 is about 2000.1477308375.

The spelling of 8001772901 in words is "eight billion, one million, seven hundred seventy-two thousand, nine hundred one".