71045423 has 4 divisors (see below), whose sum is σ = 71413728. Its totient is φ = 70677120.

The previous prime is 71045357. The next prime is 71045449. The reversal of 71045423 is 32454017.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32454017 = 47 ⋅690511.

It is a cyclic number.

It is not a de Polignac number, because 71045423 - 2⁸ = 71045167 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71045392 and 71045401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71045453) 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, 183863 + ... + 184248.

It is an arithmetic number, because the mean of its divisors is an integer number (17853432).

Almost surely, 2^71045423 is an apocalyptic number.

71045423 is a deficient number, since it is larger than the sum of its proper divisors (368305).

71045423 is a wasteful number, since it uses less digits than its factorization.

71045423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368304.

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 71045423 is about 8428.8447013811. The cubic root of 71045423 is about 414.1700605143.

The spelling of 71045423 in words is "seventy-one million, forty-five thousand, four hundred twenty-three".