121765797 has 6 divisors (see below), whose sum is σ = 175883942. Its totient is φ = 81177192.

The previous prime is 121765789. The next prime is 121765801. The reversal of 121765797 is 797567121.

121765797 is a `hidden beast` number, since 1 + 2 + 1 + 76 + 579 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 121749156 + 16641 = 11034^2 + 129^2 .

It is not a de Polignac number, because 121765797 - 2³ = 121765789 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 (121765757) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6764758 + ... + 6764775.

Almost surely, 2^121765797 is an apocalyptic number.

It is an amenable number.

121765797 is a deficient number, since it is larger than the sum of its proper divisors (54118145).

121765797 is a wasteful number, since it uses less digits than its factorization.

121765797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13529539 (or 13529536 counting only the distinct ones).

The product of its digits is 185220, while the sum is 45.

The square root of 121765797 is about 11034.7540525378. The cubic root of 121765797 is about 495.6499939795.

The spelling of 121765797 in words is "one hundred twenty-one million, seven hundred sixty-five thousand, seven hundred ninety-seven".