121893807 has 16 divisors (see below), whose sum is σ = 186583040. Its totient is φ = 69338592.

The previous prime is 121893803. The next prime is 121893817. The reversal of 121893807 is 708398121.

It is not a de Polignac number, because 121893807 - 2² = 121893803 is a prime.

It is a super-3 number, since 3×121893807³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121893803) 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, 8332 + ... + 17697.

It is an arithmetic number, because the mean of its divisors is an integer number (11661440).

Almost surely, 2^121893807 is an apocalyptic number.

121893807 is a deficient number, since it is larger than the sum of its proper divisors (64689233).

121893807 is a wasteful number, since it uses less digits than its factorization.

121893807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26262.

The product of its (nonzero) digits is 24192, while the sum is 39.

The square root of 121893807 is about 11040.5528394189. The cubic root of 121893807 is about 495.8236221968.

The spelling of 121893807 in words is "one hundred twenty-one million, eight hundred ninety-three thousand, eight hundred seven".