71973623 has 4 divisors (see below), whose sum is σ = 72987408. Its totient is φ = 70959840.

The previous prime is 71973617. The next prime is 71973637. The reversal of 71973623 is 32637917.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32637917 = 13 ⋅2510609.

It is a cyclic number.

It is not a de Polignac number, because 71973623 - 2⁴ = 71973607 is a prime.

It is a super-2 number, since 2×71973623² = 10360404815492258, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71973613) 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, 506786 + ... + 506927.

It is an arithmetic number, because the mean of its divisors is an integer number (18246852).

Almost surely, 2^71973623 is an apocalyptic number.

71973623 is a deficient number, since it is larger than the sum of its proper divisors (1013785).

71973623 is a wasteful number, since it uses less digits than its factorization.

71973623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1013784.

The product of its digits is 47628, while the sum is 38.

The square root of 71973623 is about 8483.7269522304. The cubic root of 71973623 is about 415.9659562100.

The spelling of 71973623 in words is "seventy-one million, nine hundred seventy-three thousand, six hundred twenty-three".