121908413 has 8 divisors (see below), whose sum is σ = 133094016. Its totient is φ = 110740000.

The previous prime is 121908401. The next prime is 121908463. The reversal of 121908413 is 314809121.

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 121908413 - 2¹² = 121904317 is a prime.

It is a super-2 number, since 2×121908413² = 29723322320357138, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121908463) 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, 13913 + ... + 20913.

It is an arithmetic number, because the mean of its divisors is an integer number (16636752).

Almost surely, 2^121908413 is an apocalyptic number.

It is an amenable number.

121908413 is a deficient number, since it is larger than the sum of its proper divisors (11185603).

121908413 is a wasteful number, since it uses less digits than its factorization.

121908413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8595.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 121908413 is about 11041.2142901041. The cubic root of 121908413 is about 495.8434255288.

The spelling of 121908413 in words is "one hundred twenty-one million, nine hundred eight thousand, four hundred thirteen".