121699408 has 40 divisors (see below), whose sum is σ = 249190400. Its totient is φ = 57417984.

The previous prime is 121699387. The next prime is 121699411. The reversal of 121699408 is 804996121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94513 + ... + 95791.

It is an arithmetic number, because the mean of its divisors is an integer number (6229760).

Almost surely, 2^121699408 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121699408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (124595200).

121699408 is an abundant number, since it is smaller than the sum of its proper divisors (127490992).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121699408 is a wasteful number, since it uses less digits than its factorization.

121699408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1619 (or 1613 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 40.

The square root of 121699408 is about 11031.7454647939. The cubic root of 121699408 is about 495.5598983743.

The spelling of 121699408 in words is "one hundred twenty-one million, six hundred ninety-nine thousand, four hundred eight".