77972000219 has 2 divisors, whose sum is σ = 77972000220. Its totient is φ = 77972000218.

The previous prime is 77972000173. The next prime is 77972000221. The reversal of 77972000219 is 91200027977.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77972000219 is a prime.

It is a super-2 number, since 2×77972000219² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

Together with 77972000221, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 77972000219.

It is a weakly prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38986000109 + 38986000110.

It is an arithmetic number, because the mean of its divisors is an integer number (38986000110).

Almost surely, 2^77972000219 is an apocalyptic number.

77972000219 is a deficient number, since it is larger than the sum of its proper divisors (1).

77972000219 is an equidigital number, since it uses as much as digits as its factorization.

77972000219 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 111132, while the sum is 44.

The spelling of 77972000219 in words is "seventy-seven billion, nine hundred seventy-two million, two hundred nineteen", and thus it is an aban number.