71275969 has 2 divisors, whose sum is σ = 71275970. Its totient is φ = 71275968.

The previous prime is 71275961. The next prime is 71276041. The reversal of 71275969 is 96957217.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56927025 + 14348944 = 7545^2 + 3788^2 .

It is a cyclic number.

It is not a de Polignac number, because 71275969 - 2³ = 71275961 is a prime.

It is a super-2 number, since 2×71275969² = 10160527513777922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (71275961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35637984 + 35637985.

It is an arithmetic number, because the mean of its divisors is an integer number (35637985).

Almost surely, 2^71275969 is an apocalyptic number.

It is an amenable number.

71275969 is a deficient number, since it is larger than the sum of its proper divisors (1).

71275969 is an equidigital number, since it uses as much as digits as its factorization.

71275969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 238140, while the sum is 46.

The square root of 71275969 is about 8442.5096387271. The cubic root of 71275969 is about 414.6175777397.

The spelling of 71275969 in words is "seventy-one million, two hundred seventy-five thousand, nine hundred sixty-nine".