69691289 has 2 divisors, whose sum is σ = 69691290. Its totient is φ = 69691288.

The previous prime is 69691247. The next prime is 69691301. The reversal of 69691289 is 98219696.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66912400 + 2778889 = 8180^2 + 1667^2 .

It is a cyclic number.

It is not a de Polignac number, because 69691289 - 2²⁰ = 68642713 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (69690289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34845644 + 34845645.

It is an arithmetic number, because the mean of its divisors is an integer number (34845645).

Almost surely, 2^69691289 is an apocalyptic number.

It is an amenable number.

69691289 is a deficient number, since it is larger than the sum of its proper divisors (1).

69691289 is an equidigital number, since it uses as much as digits as its factorization.

69691289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 419904, while the sum is 50.

The square root of 69691289 is about 8348.1308686436. The cubic root of 69691289 is about 411.5217866335.

The spelling of 69691289 in words is "sixty-nine million, six hundred ninety-one thousand, two hundred eighty-nine".