121783253 has 4 divisors (see below), whose sum is σ = 121912800. Its totient is φ = 121653708.

The previous prime is 121783237. The next prime is 121783271. The reversal of 121783253 is 352387121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 121783253 - 2⁴ = 121783237 is a prime.

It is a super-2 number, since 2×121783253² = 29662321422524018, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121783553) 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 in 3 ways as a sum of consecutive naturals, for example, 63353 + ... + 65246.

It is an arithmetic number, because the mean of its divisors is an integer number (30478200).

Almost surely, 2^121783253 is an apocalyptic number.

It is an amenable number.

121783253 is a deficient number, since it is larger than the sum of its proper divisors (129547).

121783253 is an equidigital number, since it uses as much as digits as its factorization.

121783253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129546.

The product of its digits is 10080, while the sum is 32.

The square root of 121783253 is about 11035.5449797461. The cubic root of 121783253 is about 495.6736778412.

The spelling of 121783253 in words is "one hundred twenty-one million, seven hundred eighty-three thousand, two hundred fifty-three".