121672279 has 2 divisors, whose sum is σ = 121672280. Its totient is φ = 121672278.

The previous prime is 121672217. The next prime is 121672319. The reversal of 121672279 is 972276121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121672279 - 2⁷ = 121672151 is a prime.

It is equal to p_6931396 and since 121672279 and 6931396 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121672079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60836139 + 60836140.

It is an arithmetic number, because the mean of its divisors is an integer number (60836140).

Almost surely, 2^121672279 is an apocalyptic number.

121672279 is a deficient number, since it is larger than the sum of its proper divisors (1).

121672279 is an equidigital number, since it uses as much as digits as its factorization.

121672279 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21168, while the sum is 37.

The square root of 121672279 is about 11030.5158084289. The cubic root of 121672279 is about 495.5230725485.

It can be divided in two parts, 121 and 672279, that added together give a square (672400 = 820²).

The spelling of 121672279 in words is "one hundred twenty-one million, six hundred seventy-two thousand, two hundred seventy-nine".