121906897 has 16 divisors (see below), whose sum is σ = 144220032. Its totient is φ = 100863360.

The previous prime is 121906891. The next prime is 121906901. The reversal of 121906897 is 798609121.

It is a cyclic number.

It is not a de Polignac number, because 121906897 - 2⁷ = 121906769 is a prime.

It is a super-2 number, since 2×121906897² = 29722583072337218, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121906891) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32133 + ... + 35725.

It is an arithmetic number, because the mean of its divisors is an integer number (9013752).

Almost surely, 2^121906897 is an apocalyptic number.

It is an amenable number.

121906897 is a deficient number, since it is larger than the sum of its proper divisors (22313135).

121906897 is a wasteful number, since it uses less digits than its factorization.

121906897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3768.

The product of its (nonzero) digits is 54432, while the sum is 43.

The square root of 121906897 is about 11041.1456380214. The cubic root of 121906897 is about 495.8413701559.

The spelling of 121906897 in words is "one hundred twenty-one million, nine hundred six thousand, eight hundred ninety-seven".