71313945 has 16 divisors (see below), whose sum is σ = 114307200. Its totient is φ = 37965824.

The previous prime is 71313923. The next prime is 71313971. The reversal of 71313945 is 54931317.

It is a cyclic number.

It is not a de Polignac number, because 71313945 - 2⁶ = 71313881 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5017 + ... + 12953.

It is an arithmetic number, because the mean of its divisors is an integer number (7144200).

Almost surely, 2^71313945 is an apocalyptic number.

It is an amenable number.

71313945 is a deficient number, since it is larger than the sum of its proper divisors (42993255).

71313945 is a wasteful number, since it uses less digits than its factorization.

71313945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8544.

The product of its digits is 11340, while the sum is 33.

The square root of 71313945 is about 8444.7584334900. The cubic root of 71313945 is about 414.6912010650.

The spelling of 71313945 in words is "seventy-one million, three hundred thirteen thousand, nine hundred forty-five".