109212079 has 2 divisors, whose sum is σ = 109212080. Its totient is φ = 109212078.

The previous prime is 109212043. The next prime is 109212091. The reversal of 109212079 is 970212901.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 109212079 - 2⁷ = 109211951 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 109212079.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (109212179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54606039 + 54606040.

It is an arithmetic number, because the mean of its divisors is an integer number (54606040).

Almost surely, 2^109212079 is an apocalyptic number.

109212079 is a deficient number, since it is larger than the sum of its proper divisors (1).

109212079 is an equidigital number, since it uses as much as digits as its factorization.

109212079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2268, while the sum is 31.

The square root of 109212079 is about 10450.4583153085. The cubic root of 109212079 is about 477.9952250009.

The spelling of 109212079 in words is "one hundred nine million, two hundred twelve thousand, seventy-nine".