69808481 has 4 divisors (see below), whose sum is σ = 72215700. Its totient is φ = 67401264.

The previous prime is 69808469. The next prime is 69808483. The reversal of 69808481 is 18480896.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 55368481 + 14440000 = 7441^2 + 3800^2 .

It is a cyclic number.

It is not a de Polignac number, because 69808481 - 2²² = 65614177 is a prime.

It is a super-2 number, since 2×69808481² = 9746448039054722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (69808483) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1203566 + ... + 1203623.

It is an arithmetic number, because the mean of its divisors is an integer number (18053925).

Almost surely, 2^69808481 is an apocalyptic number.

It is an amenable number.

69808481 is a deficient number, since it is larger than the sum of its proper divisors (2407219).

69808481 is a wasteful number, since it uses less digits than its factorization.

69808481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2407218.

The product of its (nonzero) digits is 110592, while the sum is 44.

The square root of 69808481 is about 8355.1469765648. The cubic root of 69808481 is about 411.7523274202.

The spelling of 69808481 in words is "sixty-nine million, eight hundred eight thousand, four hundred eighty-one".