121786897 has 2 divisors, whose sum is σ = 121786898. Its totient is φ = 121786896.

The previous prime is 121786871. The next prime is 121786913. The reversal of 121786897 is 798687121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 90326016 + 31460881 = 9504^2 + 5609^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121786897 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121786897.

It is not a weakly prime, because it can be changed into another prime (121786837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60893448 + 60893449.

It is an arithmetic number, because the mean of its divisors is an integer number (60893449).

Almost surely, 2^121786897 is an apocalyptic number.

It is an amenable number.

121786897 is a deficient number, since it is larger than the sum of its proper divisors (1).

121786897 is an equidigital number, since it uses as much as digits as its factorization.

121786897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 338688, while the sum is 49.

The square root of 121786897 is about 11035.7100813677. The cubic root of 121786897 is about 495.6786216432.

The spelling of 121786897 in words is "one hundred twenty-one million, seven hundred eighty-six thousand, eight hundred ninety-seven".