71621323 has 4 divisors (see below), whose sum is σ = 75834360. Its totient is φ = 67408288.

The previous prime is 71621299. The next prime is 71621399. The reversal of 71621323 is 32312617.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32312617 = 373 ⋅86629.

It is a cyclic number.

It is not a de Polignac number, because 71621323 - 2²⁵ = 38066891 is a prime.

It is a super-2 number, since 2×71621323² = 10259227816540658, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71621623) 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, 2106493 + ... + 2106526.

It is an arithmetic number, because the mean of its divisors is an integer number (18958590).

Almost surely, 2^71621323 is an apocalyptic number.

71621323 is a deficient number, since it is larger than the sum of its proper divisors (4213037).

71621323 is a wasteful number, since it uses less digits than its factorization.

71621323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4213036.

The product of its digits is 1512, while the sum is 25.

The square root of 71621323 is about 8462.9382013577. The cubic root of 71621323 is about 415.2861489997.

The spelling of 71621323 in words is "seventy-one million, six hundred twenty-one thousand, three hundred twenty-three".