71431623 has 6 divisors (see below), whose sum is σ = 103179024. Its totient is φ = 47621076.

The previous prime is 71431601. The next prime is 71431627. The reversal of 71431623 is 32613417.

71431623 is a `hidden beast` number, since 7 + 1 + 4 + 31 + 623 = 666.

It is not a de Polignac number, because 71431623 - 2⁹ = 71431111 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71431627) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3968415 + ... + 3968432.

It is an arithmetic number, because the mean of its divisors is an integer number (17196504).

Almost surely, 2^71431623 is an apocalyptic number.

71431623 is a deficient number, since it is larger than the sum of its proper divisors (31747401).

71431623 is a wasteful number, since it uses less digits than its factorization.

71431623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7936853 (or 7936850 counting only the distinct ones).

The product of its digits is 3024, while the sum is 27.

The square root of 71431623 is about 8451.7230787574. The cubic root of 71431623 is about 414.9191752405.

The spelling of 71431623 in words is "seventy-one million, four hundred thirty-one thousand, six hundred twenty-three".