69972881 has 4 divisors (see below), whose sum is σ = 76334064. Its totient is φ = 63611700.

The previous prime is 69972871. The next prime is 69972893. The reversal of 69972881 is 18827996.

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 not a de Polignac number, because 69972881 - 2⁶ = 69972817 is a prime.

It is a super-2 number, since 2×69972881² = 9792408150880322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (69972821) 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 3 ways as a sum of consecutive naturals, for example, 3180575 + ... + 3180596.

It is an arithmetic number, because the mean of its divisors is an integer number (19083516).

Almost surely, 2^69972881 is an apocalyptic number.

It is an amenable number.

69972881 is a deficient number, since it is larger than the sum of its proper divisors (6361183).

69972881 is a wasteful number, since it uses less digits than its factorization.

69972881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6361182.

The product of its digits is 435456, while the sum is 50.

The square root of 69972881 is about 8364.9794381098. The cubic root of 69972881 is about 412.0753016131.

The spelling of 69972881 in words is "sixty-nine million, nine hundred seventy-two thousand, eight hundred eighty-one".