872122019 has 2 divisors, whose sum is σ = 872122020. Its totient is φ = 872122018.

The previous prime is 872122007. The next prime is 872122109. The reversal of 872122019 is 910221278.

It is a happy number.

Together with next prime (872122109) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 872122019 - 2¹⁶ = 872056483 is a prime.

It is a super-2 number, since 2×872122019² = 1521193632049272722, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (872122319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 436061009 + 436061010.

It is an arithmetic number, because the mean of its divisors is an integer number (436061010).

Almost surely, 2^872122019 is an apocalyptic number.

872122019 is a deficient number, since it is larger than the sum of its proper divisors (1).

872122019 is an equidigital number, since it uses as much as digits as its factorization.

872122019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 872122019 is about 29531.7120905646. The cubic root of 872122019 is about 955.4157958423.

The spelling of 872122019 in words is "eight hundred seventy-two million, one hundred twenty-two thousand, nineteen".