121707823 has 2 divisors, whose sum is σ = 121707824. Its totient is φ = 121707822.

The previous prime is 121707799. The next prime is 121707841. The reversal of 121707823 is 328707121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121707823 - 2⁵ = 121707791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121707623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60853911 + 60853912.

It is an arithmetic number, because the mean of its divisors is an integer number (60853912).

Almost surely, 2^121707823 is an apocalyptic number.

121707823 is a deficient number, since it is larger than the sum of its proper divisors (1).

121707823 is an equidigital number, since it uses as much as digits as its factorization.

121707823 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4704, while the sum is 31.

The square root of 121707823 is about 11032.1268575012. The cubic root of 121707823 is about 495.5713200690.

The spelling of 121707823 in words is "one hundred twenty-one million, seven hundred seven thousand, eight hundred twenty-three".