71430109 has 2 divisors, whose sum is σ = 71430110. Its totient is φ = 71430108.

The previous prime is 71430089. The next prime is 71430119. The reversal of 71430109 is 90103417.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45522009 + 25908100 = 6747^2 + 5090^2 .

It is a cyclic number.

It is not a de Polignac number, because 71430109 - 2¹⁵ = 71397341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71430119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35715054 + 35715055.

It is an arithmetic number, because the mean of its divisors is an integer number (35715055).

Almost surely, 2^71430109 is an apocalyptic number.

It is an amenable number.

71430109 is a deficient number, since it is larger than the sum of its proper divisors (1).

71430109 is an equidigital number, since it uses as much as digits as its factorization.

71430109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 71430109 is about 8451.6335107481. The cubic root of 71430109 is about 414.9162438028.

The spelling of 71430109 in words is "seventy-one million, four hundred thirty thousand, one hundred nine".