71920043 has 4 divisors (see below), whose sum is σ = 77452368. Its totient is φ = 66387720.

The previous prime is 71920039. The next prime is 71920061. The reversal of 71920043 is 34002917.

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 71920043 - 2² = 71920039 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71919994 and 71920021.

It is not an unprimeable number, because it can be changed into a prime (71920033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2766143 + ... + 2766168.

It is an arithmetic number, because the mean of its divisors is an integer number (19363092).

Almost surely, 2^71920043 is an apocalyptic number.

71920043 is a deficient number, since it is larger than the sum of its proper divisors (5532325).

71920043 is a wasteful number, since it uses less digits than its factorization.

71920043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5532324.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 71920043 is about 8480.5685540534. The cubic root of 71920043 is about 415.8627101047.

The spelling of 71920043 in words is "seventy-one million, nine hundred twenty thousand, forty-three".