69971149 has 2 divisors, whose sum is σ = 69971150. Its totient is φ = 69971148.

The previous prime is 69971147. The next prime is 69971159. The reversal of 69971149 is 94117996.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56355049 + 13616100 = 7507^2 + 3690^2 .

It is a cyclic number.

It is not a de Polignac number, because 69971149 - 2¹ = 69971147 is a prime.

Together with 69971147, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 69971099 and 69971108.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (69971147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34985574 + 34985575.

It is an arithmetic number, because the mean of its divisors is an integer number (34985575).

Almost surely, 2^69971149 is an apocalyptic number.

It is an amenable number.

69971149 is a deficient number, since it is larger than the sum of its proper divisors (1).

69971149 is an equidigital number, since it uses as much as digits as its factorization.

69971149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 122472, while the sum is 46.

The square root of 69971149 is about 8364.8759106158. The cubic root of 69971149 is about 412.0719016277.

The spelling of 69971149 in words is "sixty-nine million, nine hundred seventy-one thousand, one hundred forty-nine".