69943121 has 2 divisors, whose sum is σ = 69943122. Its totient is φ = 69943120.

The previous prime is 69943087. The next prime is 69943129. The reversal of 69943121 is 12134996.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44742721 + 25200400 = 6689^2 + 5020^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-69943121 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (69943129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34971560 + 34971561.

It is an arithmetic number, because the mean of its divisors is an integer number (34971561).

Almost surely, 2^69943121 is an apocalyptic number.

It is an amenable number.

69943121 is a deficient number, since it is larger than the sum of its proper divisors (1).

69943121 is an equidigital number, since it uses as much as digits as its factorization.

69943121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11664, while the sum is 35.

The square root of 69943121 is about 8363.2004041515. The cubic root of 69943121 is about 412.0168737394.

The spelling of 69943121 in words is "sixty-nine million, nine hundred forty-three thousand, one hundred twenty-one".