69408481 has 4 divisors (see below), whose sum is σ = 69472512. Its totient is φ = 69344452.

The previous prime is 69408461. The next prime is 69408491. The reversal of 69408481 is 18480496.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-69408481 is a prime.

It is a super-2 number, since 2×69408481² = 9635074469454722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (69408401) by changing a digit.

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, 30361 + ... + 32566.

It is an arithmetic number, because the mean of its divisors is an integer number (17368128).

Almost surely, 2^69408481 is an apocalyptic number.

It is an amenable number.

69408481 is a deficient number, since it is larger than the sum of its proper divisors (64031).

69408481 is a wasteful number, since it uses less digits than its factorization.

69408481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64030.

The product of its (nonzero) digits is 55296, while the sum is 40.

The square root of 69408481 is about 8331.1752472265. The cubic root of 69408481 is about 410.9643786849.

The spelling of 69408481 in words is "sixty-nine million, four hundred eight thousand, four hundred eighty-one".