71274109 has 2 divisors, whose sum is σ = 71274110. Its totient is φ = 71274108.

The previous prime is 71274107. The next prime is 71274139. The reversal of 71274109 is 90147217.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62062884 + 9211225 = 7878^2 + 3035^2 .

It is an emirp because it is prime and its reverse (90147217) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71274109 - 2¹ = 71274107 is a prime.

It is a super-2 number, since 2×71274109² = 10159997227487762, which contains 22 as substring.

Together with 71274107, 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 (71274101) 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, 35637054 + 35637055.

It is an arithmetic number, because the mean of its divisors is an integer number (35637055).

Almost surely, 2^71274109 is an apocalyptic number.

It is an amenable number.

71274109 is a deficient number, since it is larger than the sum of its proper divisors (1).

71274109 is an equidigital number, since it uses as much as digits as its factorization.

71274109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3528, while the sum is 31.

The square root of 71274109 is about 8442.3994811902. The cubic root of 71274109 is about 414.6139711226.

It can be divided in two parts, 7127 and 4109, that added together give a square (11236 = 106²).

The spelling of 71274109 in words is "seventy-one million, two hundred seventy-four thousand, one hundred nine".