69687081 has 8 divisors (see below), whose sum is σ = 103240160. Its totient is φ = 46458036.

The previous prime is 69687073. The next prime is 69687127. The reversal of 69687081 is 18078696.

It is a happy number.

It is not a de Polignac number, because 69687081 - 2³ = 69687073 is a prime.

It is a super-2 number, since 2×69687081² = 9712578516601122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (69687781) 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, 1290475 + ... + 1290528.

It is an arithmetic number, because the mean of its divisors is an integer number (12905020).

Almost surely, 2^69687081 is an apocalyptic number.

It is an amenable number.

69687081 is a deficient number, since it is larger than the sum of its proper divisors (33553079).

69687081 is a wasteful number, since it uses less digits than its factorization.

69687081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2581012 (or 2581006 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 69687081 is about 8347.8788323741. The cubic root of 69687081 is about 411.5135038263.

The spelling of 69687081 in words is "sixty-nine million, six hundred eighty-seven thousand, eighty-one".