71622973 has 4 divisors (see below), whose sum is σ = 71742748. Its totient is φ = 71503200.

The previous prime is 71622937. The next prime is 71622977. The reversal of 71622973 is 37922617.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 37922617 = 83 ⋅456899.

It can be written as a sum of positive squares in 2 ways, for example, as 63568729 + 8054244 = 7973^2 + 2838^2 .

It is a cyclic number.

It is not a de Polignac number, because 71622973 - 2⁹ = 71622461 is a prime.

It is a super-2 number, since 2×71622973² = 10259700522717458, 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 (71622977) 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, 58986 + ... + 60187.

It is an arithmetic number, because the mean of its divisors is an integer number (17935687).

Almost surely, 2^71622973 is an apocalyptic number.

It is an amenable number.

71622973 is a deficient number, since it is larger than the sum of its proper divisors (119775).

71622973 is a wasteful number, since it uses less digits than its factorization.

71622973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119774.

The product of its digits is 31752, while the sum is 37.

The square root of 71622973 is about 8463.0356846701. The cubic root of 71622973 is about 415.2893380727.

The spelling of 71622973 in words is "seventy-one million, six hundred twenty-two thousand, nine hundred seventy-three".