71812879 has 8 divisors (see below), whose sum is σ = 77109408. Its totient is φ = 66635520.

The previous prime is 71812861. The next prime is 71812907. The reversal of 71812879 is 97821817.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 71812879 - 2¹¹ = 71810831 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71812849) 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, 28542 + ... + 30955.

It is an arithmetic number, because the mean of its divisors is an integer number (9638676).

Almost surely, 2^71812879 is an apocalyptic number.

71812879 is a deficient number, since it is larger than the sum of its proper divisors (5296529).

71812879 is a wasteful number, since it uses less digits than its factorization.

71812879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59585.

The product of its digits is 56448, while the sum is 43.

The square root of 71812879 is about 8474.2479902349. The cubic root of 71812879 is about 415.6560562393.

It can be divided in two parts, 71 and 812879, that multiplied together give a square (57714409 = 7597²).

The spelling of 71812879 in words is "seventy-one million, eight hundred twelve thousand, eight hundred seventy-nine".