71940819 has 8 divisors (see below), whose sum is σ = 95988160. Its totient is φ = 47927016.

The previous prime is 71940811. The next prime is 71940833. The reversal of 71940819 is 91804917.

It is a happy number.

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

It is not a de Polignac number, because 71940819 - 2³ = 71940811 is a prime.

It is a super-2 number, since 2×71940819² = 10350962876781522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71940811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2857 + ... + 12330.

It is an arithmetic number, because the mean of its divisors is an integer number (11998520).

Almost surely, 2^71940819 is an apocalyptic number.

71940819 is a deficient number, since it is larger than the sum of its proper divisors (24047341).

71940819 is a wasteful number, since it uses less digits than its factorization.

71940819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16769.

The product of its (nonzero) digits is 18144, while the sum is 39.

The square root of 71940819 is about 8481.7933834773. The cubic root of 71940819 is about 415.9027505509.

The spelling of 71940819 in words is "seventy-one million, nine hundred forty thousand, eight hundred nineteen".