121679897 has 8 divisors (see below), whose sum is σ = 129213000. Its totient is φ = 114188544.

The previous prime is 121679893. The next prime is 121679917. The reversal of 121679897 is 798976121.

It can be written as a sum of positive squares in 4 ways, for example, as 28344976 + 93334921 = 5324^2 + 9661^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121679897 - 2² = 121679893 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121679893) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4322 + ... + 16187.

It is an arithmetic number, because the mean of its divisors is an integer number (16151625).

Almost surely, 2^121679897 is an apocalyptic number.

121679897 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

121679897 is a deficient number, since it is larger than the sum of its proper divisors (7533103).

121679897 is a wasteful number, since it uses less digits than its factorization.

121679897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20875.

The product of its digits is 381024, while the sum is 50.

The square root of 121679897 is about 11030.8611177913. The cubic root of 121679897 is about 495.5334140331.

The spelling of 121679897 in words is "one hundred twenty-one million, six hundred seventy-nine thousand, eight hundred ninety-seven".