71921323 has 4 divisors (see below), whose sum is σ = 71953888. Its totient is φ = 71888760.

The previous prime is 71921287. The next prime is 71921359. The reversal of 71921323 is 32312917.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (71921287) and next prime (71921359).

It is a cyclic number.

It is not a de Polignac number, because 71921323 - 2²¹ = 69824171 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71921291 and 71921300.

It is not an unprimeable number, because it can be changed into a prime (71921123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12708 + ... + 17473.

It is an arithmetic number, because the mean of its divisors is an integer number (17988472).

Almost surely, 2^71921323 is an apocalyptic number.

71921323 is a deficient number, since it is larger than the sum of its proper divisors (32565).

71921323 is a wasteful number, since it uses less digits than its factorization.

71921323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32564.

The product of its digits is 2268, while the sum is 28.

The square root of 71921323 is about 8480.6440203560. The cubic root of 71921323 is about 415.8651772014.

It can be divided in two parts, 7192 and 1323, that added together give a triangular number (8515 = T₁₃₀).

The spelling of 71921323 in words is "seventy-one million, nine hundred twenty-one thousand, three hundred twenty-three".