69389989 has 2 divisors, whose sum is σ = 69389990. Its totient is φ = 69389988.

The previous prime is 69389987. The next prime is 69389993. The reversal of 69389989 is 98998396.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69388900 + 1089 = 8330^2 + 33^2 .

It is a cyclic number.

It is not a de Polignac number, because 69389989 - 2¹ = 69389987 is a prime.

Together with 69389987, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (69389981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34694994 + 34694995.

It is an arithmetic number, because the mean of its divisors is an integer number (34694995).

Almost surely, 2^69389989 is an apocalyptic number.

It is an amenable number.

69389989 is a deficient number, since it is larger than the sum of its proper divisors (1).

69389989 is an equidigital number, since it uses as much as digits as its factorization.

69389989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7558272, while the sum is 61.

The square root of 69389989 is about 8330.0653658900. The cubic root of 69389989 is about 410.9278786868.

The spelling of 69389989 in words is "sixty-nine million, three hundred eighty-nine thousand, nine hundred eighty-nine".