69137081 has 4 divisors (see below), whose sum is σ = 74455332. Its totient is φ = 63818832.

The previous prime is 69137051. The next prime is 69137093. The reversal of 69137081 is 18073196.

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 34515625 + 34621456 = 5875^2 + 5884^2 .

It is a cyclic number.

It is not a de Polignac number, because 69137081 - 2⁶ = 69137017 is a prime.

It is a super-2 number, since 2×69137081² = 9559871938401122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (69137051) 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, 2659106 + ... + 2659131.

It is an arithmetic number, because the mean of its divisors is an integer number (18613833).

Almost surely, 2^69137081 is an apocalyptic number.

It is an amenable number.

69137081 is a deficient number, since it is larger than the sum of its proper divisors (5318251).

69137081 is a wasteful number, since it uses less digits than its factorization.

69137081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5318250.

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 69137081 is about 8314.8710753685. The cubic root of 69137081 is about 410.4280300884.

The spelling of 69137081 in words is "sixty-nine million, one hundred thirty-seven thousand, eighty-one".