121683757 has 4 divisors (see below), whose sum is σ = 131044060. Its totient is φ = 112323456.

The previous prime is 121683721. The next prime is 121683761. The reversal of 121683757 is 757386121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 757386121 = 241 ⋅3142681.

It can be written as a sum of positive squares in 2 ways, for example, as 35212356 + 86471401 = 5934^2 + 9299^2 .

It is a cyclic number.

It is not a de Polignac number, because 121683757 - 2¹⁵ = 121650989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121683257) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4680132 + ... + 4680157.

It is an arithmetic number, because the mean of its divisors is an integer number (32761015).

Almost surely, 2^121683757 is an apocalyptic number.

It is an amenable number.

121683757 is a deficient number, since it is larger than the sum of its proper divisors (9360303).

121683757 is an equidigital number, since it uses as much as digits as its factorization.

121683757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9360302.

The product of its digits is 70560, while the sum is 40.

The square root of 121683757 is about 11031.0360800788. The cubic root of 121683757 is about 495.5386538435.

The spelling of 121683757 in words is "one hundred twenty-one million, six hundred eighty-three thousand, seven hundred fifty-seven".