121853929 has 2 divisors, whose sum is σ = 121853930. Its totient is φ = 121853928.

The previous prime is 121853923. The next prime is 121853947. The reversal of 121853929 is 929358121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68227600 + 53626329 = 8260^2 + 7323^2 .

It is a cyclic number.

It is not a de Polignac number, because 121853929 - 2⁷ = 121853801 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121853891 and 121853900.

It is not a weakly prime, because it can be changed into another prime (121853923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60926964 + 60926965.

It is an arithmetic number, because the mean of its divisors is an integer number (60926965).

Almost surely, 2^121853929 is an apocalyptic number.

It is an amenable number.

121853929 is a deficient number, since it is larger than the sum of its proper divisors (1).

121853929 is an equidigital number, since it uses as much as digits as its factorization.

121853929 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38880, while the sum is 40.

The square root of 121853929 is about 11038.7467132823. The cubic root of 121853929 is about 495.7695461353.

The spelling of 121853929 in words is "one hundred twenty-one million, eight hundred fifty-three thousand, nine hundred twenty-nine".