121783723 has 2 divisors, whose sum is σ = 121783724. Its totient is φ = 121783722.

The previous prime is 121783703. The next prime is 121783751. The reversal of 121783723 is 327387121.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121783723 - 2¹³ = 121775531 is a prime.

It is not a weakly prime, because it can be changed into another prime (121783703) 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, 60891861 + 60891862.

It is an arithmetic number, because the mean of its divisors is an integer number (60891862).

Almost surely, 2^121783723 is an apocalyptic number.

121783723 is a deficient number, since it is larger than the sum of its proper divisors (1).

121783723 is an equidigital number, since it uses as much as digits as its factorization.

121783723 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14112, while the sum is 34.

The square root of 121783723 is about 11035.5662745507. The cubic root of 121783723 is about 495.6743154941.

The spelling of 121783723 in words is "one hundred twenty-one million, seven hundred eighty-three thousand, seven hundred twenty-three".