121679783 has 2 divisors, whose sum is σ = 121679784. Its totient is φ = 121679782.

The previous prime is 121679777. The next prime is 121679893. The reversal of 121679783 is 387976121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121679783 - 2⁸ = 121679527 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121679713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60839891 + 60839892.

It is an arithmetic number, because the mean of its divisors is an integer number (60839892).

Almost surely, 2^121679783 is an apocalyptic number.

121679783 is a deficient number, since it is larger than the sum of its proper divisors (1).

121679783 is an equidigital number, since it uses as much as digits as its factorization.

121679783 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 127008, while the sum is 44.

The square root of 121679783 is about 11030.8559504691. The cubic root of 121679783 is about 495.5332592806.

The spelling of 121679783 in words is "one hundred twenty-one million, six hundred seventy-nine thousand, seven hundred eighty-three".