69942881 has 8 divisors (see below), whose sum is σ = 72270144. Its totient is φ = 67653040.

The previous prime is 69942877. The next prime is 69942911. The reversal of 69942881 is 18824996.

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 69942881 - 2² = 69942877 is a prime.

It is a super-2 number, since 2×69942881² = 9784013205160322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (69942581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5531 + ... + 13056.

It is an arithmetic number, because the mean of its divisors is an integer number (9033768).

Almost surely, 2^69942881 is an apocalyptic number.

It is an amenable number.

69942881 is a deficient number, since it is larger than the sum of its proper divisors (2327263).

69942881 is a wasteful number, since it uses less digits than its factorization.

69942881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18711.

The product of its digits is 248832, while the sum is 47.

The square root of 69942881 is about 8363.1860555652. The cubic root of 69942881 is about 412.0164024795.

The spelling of 69942881 in words is "sixty-nine million, nine hundred forty-two thousand, eight hundred eighty-one".