121895897 has 2 divisors, whose sum is σ = 121895898. Its totient is φ = 121895896.

The previous prime is 121895869. The next prime is 121895909. The reversal of 121895897 is 798598121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68079001 + 53816896 = 8251^2 + 7336^2 .

It is a cyclic number.

It is not a de Polignac number, because 121895897 - 2¹⁰ = 121894873 is a prime.

It is not a weakly prime, because it can be changed into another prime (121895197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60947948 + 60947949.

It is an arithmetic number, because the mean of its divisors is an integer number (60947949).

Almost surely, 2^121895897 is an apocalyptic number.

It is an amenable number.

121895897 is a deficient number, since it is larger than the sum of its proper divisors (1).

121895897 is an equidigital number, since it uses as much as digits as its factorization.

121895897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 362880, while the sum is 50.

The square root of 121895897 is about 11040.6474900705. The cubic root of 121895897 is about 495.8264559898.

The spelling of 121895897 in words is "one hundred twenty-one million, eight hundred ninety-five thousand, eight hundred ninety-seven".