69169421 has 2 divisors, whose sum is σ = 69169422. Its totient is φ = 69169420.

The previous prime is 69169411. The next prime is 69169423. The reversal of 69169421 is 12496196.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56460196 + 12709225 = 7514^2 + 3565^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-69169421 is a prime.

Together with 69169423, 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 (69169423) 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 as a sum of consecutive naturals, namely, 34584710 + 34584711.

It is an arithmetic number, because the mean of its divisors is an integer number (34584711).

Almost surely, 2^69169421 is an apocalyptic number.

It is an amenable number.

69169421 is a deficient number, since it is larger than the sum of its proper divisors (1).

69169421 is an equidigital number, since it uses as much as digits as its factorization.

69169421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23328, while the sum is 38.

The square root of 69169421 is about 8316.8155564495. The cubic root of 69169421 is about 410.4920149199.

The spelling of 69169421 in words is "sixty-nine million, one hundred sixty-nine thousand, four hundred twenty-one".