71452609 has 2 divisors, whose sum is σ = 71452610. Its totient is φ = 71452608.

The previous prime is 71452603. The next prime is 71452637. The reversal of 71452609 is 90625417.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59721984 + 11730625 = 7728^2 + 3425^2 .

It is an emirp because it is prime and its reverse (90625417) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71452609 - 2²¹ = 69355457 is a prime.

It is equal to p_4198480 and since 71452609 and 4198480 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (71452603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35726304 + 35726305.

It is an arithmetic number, because the mean of its divisors is an integer number (35726305).

Almost surely, 2^71452609 is an apocalyptic number.

It is an amenable number.

71452609 is a deficient number, since it is larger than the sum of its proper divisors (1).

71452609 is an equidigital number, since it uses as much as digits as its factorization.

71452609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 71452609 is about 8452.9645095670. The cubic root of 71452609 is about 414.9598044971.

The spelling of 71452609 in words is "seventy-one million, four hundred fifty-two thousand, six hundred nine".