69090389 has 2 divisors, whose sum is σ = 69090390. Its totient is φ = 69090388.

The previous prime is 69090377. The next prime is 69090391. The reversal of 69090389 is 98309096.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57304900 + 11785489 = 7570^2 + 3433^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-69090389 is a prime.

Together with 69090391, it forms a pair of twin primes.

It is a Chen prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (69090349) 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, 34545194 + 34545195.

It is an arithmetic number, because the mean of its divisors is an integer number (34545195).

Almost surely, 2^69090389 is an apocalyptic number.

It is an amenable number.

69090389 is a deficient number, since it is larger than the sum of its proper divisors (1).

69090389 is an equidigital number, since it uses as much as digits as its factorization.

69090389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 104976, while the sum is 44.

The square root of 69090389 is about 8312.0628606863. The cubic root of 69090389 is about 410.3356145519.

The spelling of 69090389 in words is "sixty-nine million, ninety thousand, three hundred eighty-nine".