69139897 has 2 divisors, whose sum is σ = 69139898. Its totient is φ = 69139896.

The previous prime is 69139849. The next prime is 69139907. The reversal of 69139897 is 79893196.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59305401 + 9834496 = 7701^2 + 3136^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-69139897 is a prime.

It is not a weakly prime, because it can be changed into another prime (69139297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34569948 + 34569949.

It is an arithmetic number, because the mean of its divisors is an integer number (34569949).

Almost surely, 2^69139897 is an apocalyptic number.

It is an amenable number.

69139897 is a deficient number, since it is larger than the sum of its proper divisors (1).

69139897 is an equidigital number, since it uses as much as digits as its factorization.

69139897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 734832, while the sum is 52.

The square root of 69139897 is about 8315.0404088014. The cubic root of 69139897 is about 410.4336023497.

The spelling of 69139897 in words is "sixty-nine million, one hundred thirty-nine thousand, eight hundred ninety-seven".