71879823 has 6 divisors (see below), whose sum is σ = 103826424. Its totient is φ = 47919876.

The previous prime is 71879803. The next prime is 71879867. The reversal of 71879823 is 32897817.

It is a de Polignac number, because none of the positive numbers 2^k-71879823 is a prime.

It is a super-2 number, since 2×71879823² = 10333417909022658, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71879803) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3993315 + ... + 3993332.

It is an arithmetic number, because the mean of its divisors is an integer number (17304404).

Almost surely, 2^71879823 is an apocalyptic number.

71879823 is a deficient number, since it is larger than the sum of its proper divisors (31946601).

71879823 is a wasteful number, since it uses less digits than its factorization.

71879823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7986653 (or 7986650 counting only the distinct ones).

The product of its digits is 169344, while the sum is 45.

The square root of 71879823 is about 8478.1969191568. The cubic root of 71879823 is about 415.7851743841.

The spelling of 71879823 in words is "seventy-one million, eight hundred seventy-nine thousand, eight hundred twenty-three".