7120981919 has 2 divisors, whose sum is σ = 7120981920. Its totient is φ = 7120981918.

The previous prime is 7120981877. The next prime is 7120981943. The reversal of 7120981919 is 9191890217.

It is a strong prime.

It is an emirp because it is prime and its reverse (9191890217) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7120981919 - 2¹² = 7120977823 is a prime.

It is a super-2 number, since 2×7120981919² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7120981969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3560490959 + 3560490960.

It is an arithmetic number, because the mean of its divisors is an integer number (3560490960).

Almost surely, 2^7120981919 is an apocalyptic number.

7120981919 is a deficient number, since it is larger than the sum of its proper divisors (1).

7120981919 is an equidigital number, since it uses as much as digits as its factorization.

7120981919 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81648, while the sum is 47.

The square root of 7120981919 is about 84385.9106664140. The cubic root of 7120981919 is about 1923.8887762340. Note that the first 3 decimals are identical.

The spelling of 7120981919 in words is "seven billion, one hundred twenty million, nine hundred eighty-one thousand, nine hundred nineteen".