69348821 has 2 divisors, whose sum is σ = 69348822. Its totient is φ = 69348820.

The previous prime is 69348817. The next prime is 69348823. The reversal of 69348821 is 12884396.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57168721 + 12180100 = 7561^2 + 3490^2 .

It is a cyclic number.

It is not a de Polignac number, because 69348821 - 2² = 69348817 is a prime.

Together with 69348823, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (69348823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34674410 + 34674411.

It is an arithmetic number, because the mean of its divisors is an integer number (34674411).

Almost surely, 2^69348821 is an apocalyptic number.

It is an amenable number.

69348821 is a deficient number, since it is larger than the sum of its proper divisors (1).

69348821 is an equidigital number, since it uses as much as digits as its factorization.

69348821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 82944, while the sum is 41.

The square root of 69348821 is about 8327.5939502356. The cubic root of 69348821 is about 410.8465969063.

The spelling of 69348821 in words is "sixty-nine million, three hundred forty-eight thousand, eight hundred twenty-one".