121958797 has 4 divisors (see below), whose sum is σ = 122266396. Its totient is φ = 121651200.

The previous prime is 121958741. The next prime is 121958801. The reversal of 121958797 is 797859121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 102191881 + 19766916 = 10109^2 + 4446^2 .

It is a cyclic number.

It is not a de Polignac number, because 121958797 - 2¹¹ = 121956749 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121958797.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121958737) 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, 153204 + ... + 153997.

It is an arithmetic number, because the mean of its divisors is an integer number (30566599).

Almost surely, 2^121958797 is an apocalyptic number.

It is an amenable number.

121958797 is a deficient number, since it is larger than the sum of its proper divisors (307599).

121958797 is an equidigital number, since it uses as much as digits as its factorization.

121958797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307598.

The product of its digits is 317520, while the sum is 49.

The square root of 121958797 is about 11043.4956875076. The cubic root of 121958797 is about 495.9117258033.

The spelling of 121958797 in words is "one hundred twenty-one million, nine hundred fifty-eight thousand, seven hundred ninety-seven".