71612447 has 2 divisors, whose sum is σ = 71612448. Its totient is φ = 71612446.

The previous prime is 71612419. The next prime is 71612461. The reversal of 71612447 is 74421617.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 71612447 - 2¹⁶ = 71546911 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71612407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35806223 + 35806224.

It is an arithmetic number, because the mean of its divisors is an integer number (35806224).

Almost surely, 2^71612447 is an apocalyptic number.

71612447 is a deficient number, since it is larger than the sum of its proper divisors (1).

71612447 is an equidigital number, since it uses as much as digits as its factorization.

71612447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9408, while the sum is 32.

The square root of 71612447 is about 8462.4137809493. The cubic root of 71612447 is about 415.2689928792.

The spelling of 71612447 in words is "seventy-one million, six hundred twelve thousand, four hundred forty-seven".