1216974079 has 2 divisors, whose sum is σ = 1216974080. Its totient is φ = 1216974078.

The previous prime is 1216974043. The next prime is 1216974097. The reversal of 1216974079 is 9704796121.

Together with next prime (1216974097) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1216974079 - 2¹³ = 1216965887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1216974679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 608487039 + 608487040.

It is an arithmetic number, because the mean of its divisors is an integer number (608487040).

Almost surely, 2^1216974079 is an apocalyptic number.

1216974079 is a deficient number, since it is larger than the sum of its proper divisors (1).

1216974079 is an equidigital number, since it uses as much as digits as its factorization.

1216974079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 190512, while the sum is 46.

The square root of 1216974079 is about 34885.1555679490. The cubic root of 1216974079 is about 1067.6455871508.

The spelling of 1216974079 in words is "one billion, two hundred sixteen million, nine hundred seventy-four thousand, seventy-nine".