71447867 has 4 divisors (see below), whose sum is σ = 74554320. Its totient is φ = 68341416.

The previous prime is 71447833. The next prime is 71447891. The reversal of 71447867 is 76874417.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 71447867 - 2⁸ = 71447611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71447267) 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, 1553192 + ... + 1553237.

It is an arithmetic number, because the mean of its divisors is an integer number (18638580).

Almost surely, 2^71447867 is an apocalyptic number.

71447867 is a deficient number, since it is larger than the sum of its proper divisors (3106453).

71447867 is a wasteful number, since it uses less digits than its factorization.

71447867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3106452.

The product of its digits is 263424, while the sum is 44.

The square root of 71447867 is about 8452.6840116025. The cubic root of 71447867 is about 414.9506245994.

The spelling of 71447867 in words is "seventy-one million, four hundred forty-seven thousand, eight hundred sixty-seven".