2021792191 has 2 divisors, whose sum is σ = 2021792192. Its totient is φ = 2021792190.

The previous prime is 2021792183. The next prime is 2021792197. The reversal of 2021792191 is 1912971202.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2021792191 - 2³ = 2021792183 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2021792197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010896095 + 1010896096.

It is an arithmetic number, because the mean of its divisors is an integer number (1010896096).

Almost surely, 2^2021792191 is an apocalyptic number.

2021792191 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021792191 is an equidigital number, since it uses as much as digits as its factorization.

2021792191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 34.

The square root of 2021792191 is about 44964.3435513074. The cubic root of 2021792191 is about 1264.4806026964.

The spelling of 2021792191 in words is "two billion, twenty-one million, seven hundred ninety-two thousand, one hundred ninety-one".