69343721 has 2 divisors, whose sum is σ = 69343722. Its totient is φ = 69343720.

The previous prime is 69343717. The next prime is 69343723. The reversal of 69343721 is 12734396.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66667225 + 2676496 = 8165^2 + 1636^2 .

It is a cyclic number.

It is not a de Polignac number, because 69343721 - 2² = 69343717 is a prime.

Together with 69343723, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (69343723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34671860 + 34671861.

It is an arithmetic number, because the mean of its divisors is an integer number (34671861).

Almost surely, 2^69343721 is an apocalyptic number.

It is an amenable number.

69343721 is a deficient number, since it is larger than the sum of its proper divisors (1).

69343721 is an equidigital number, since it uses as much as digits as its factorization.

69343721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27216, while the sum is 35.

The square root of 69343721 is about 8327.2877337102. The cubic root of 69343721 is about 410.8365252666.

The spelling of 69343721 in words is "sixty-nine million, three hundred forty-three thousand, seven hundred twenty-one".