71422447 has 4 divisors (see below), whose sum is σ = 73885320. Its totient is φ = 68959576.

The previous prime is 71422433. The next prime is 71422487. The reversal of 71422447 is 74422417.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74422417 = 509 ⋅146213.

It is a cyclic number.

It is not a de Polignac number, because 71422447 - 2¹⁵ = 71389679 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71422487) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1231393 + ... + 1231450.

It is an arithmetic number, because the mean of its divisors is an integer number (18471330).

Almost surely, 2^71422447 is an apocalyptic number.

71422447 is a deficient number, since it is larger than the sum of its proper divisors (2462873).

71422447 is a wasteful number, since it uses less digits than its factorization.

71422447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2462872.

The product of its digits is 12544, while the sum is 31.

The square root of 71422447 is about 8451.1802134376. The cubic root of 71422447 is about 414.9014078464.

The spelling of 71422447 in words is "seventy-one million, four hundred twenty-two thousand, four hundred forty-seven".