121840783 has 2 divisors, whose sum is σ = 121840784. Its totient is φ = 121840782.

The previous prime is 121840777. The next prime is 121840847. The reversal of 121840783 is 387048121.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121840783 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121840753) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60920391 + 60920392.

It is an arithmetic number, because the mean of its divisors is an integer number (60920392).

Almost surely, 2^121840783 is an apocalyptic number.

121840783 is a deficient number, since it is larger than the sum of its proper divisors (1).

121840783 is an equidigital number, since it uses as much as digits as its factorization.

121840783 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10752, while the sum is 34.

The square root of 121840783 is about 11038.1512491902. The cubic root of 121840783 is about 495.7517170813.

The spelling of 121840783 in words is "one hundred twenty-one million, eight hundred forty thousand, seven hundred eighty-three".