1967998567 has 2 divisors, whose sum is σ = 1967998568. Its totient is φ = 1967998566.

The previous prime is 1967998547. The next prime is 1967998577. The reversal of 1967998567 is 7658997691.

It is a strong prime.

It is an emirp because it is prime and its reverse (7658997691) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1967998567 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1967998507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 983999283 + 983999284.

It is an arithmetic number, because the mean of its divisors is an integer number (983999284).

Almost surely, 2^1967998567 is an apocalyptic number.

1967998567 is a deficient number, since it is larger than the sum of its proper divisors (1).

1967998567 is an equidigital number, since it uses as much as digits as its factorization.

1967998567 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51438240, while the sum is 67.

The square root of 1967998567 is about 44362.1298744774. The cubic root of 1967998567 is about 1253.1650070473.

The spelling of 1967998567 in words is "one billion, nine hundred sixty-seven million, nine hundred ninety-eight thousand, five hundred sixty-seven".