71916945 has 8 divisors (see below), whose sum is σ = 115067136. Its totient is φ = 38355696.

The previous prime is 71916913. The next prime is 71916979. The reversal of 71916945 is 54961917.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 71916945 - 2⁵ = 71916913 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 71916897 and 71916906.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2397217 + ... + 2397246.

It is an arithmetic number, because the mean of its divisors is an integer number (14383392).

Almost surely, 2^71916945 is an apocalyptic number.

It is an amenable number.

71916945 is a deficient number, since it is larger than the sum of its proper divisors (43150191).

71916945 is a wasteful number, since it uses less digits than its factorization.

71916945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4794471.

The product of its digits is 68040, while the sum is 42.

The square root of 71916945 is about 8480.3858992383. The cubic root of 71916945 is about 415.8567388385.

The spelling of 71916945 in words is "seventy-one million, nine hundred sixteen thousand, nine hundred forty-five".