69121408 has 32 divisors (see below), whose sum is σ = 141072120. Its totient is φ = 33715200.

The previous prime is 69121399. The next prime is 69121427. The reversal of 69121408 is 80412196.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (32).

It is a self number, because there is not a number n which added to its sum of digits gives 69121408.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1338 + ... + 11833.

Almost surely, 2^69121408 is an apocalyptic number.

It is an amenable number.

69121408 is an abundant number, since it is smaller than the sum of its proper divisors (71950712).

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

69121408 is a wasteful number, since it uses less digits than its factorization.

69121408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13226 (or 13214 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 69121408 is about 8313.9285539389. The cubic root of 69121408 is about 410.3970138110.

The spelling of 69121408 in words is "sixty-nine million, one hundred twenty-one thousand, four hundred eight".