71993973 has 8 divisors (see below), whose sum is σ = 96117088. Its totient is φ = 47933424.

The previous prime is 71993959. The next prime is 71993993. The reversal of 71993973 is 37939917.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 71993973 - 2⁵ = 71993941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71993923) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12886 + ... + 17607.

It is an arithmetic number, because the mean of its divisors is an integer number (12014636).

Almost surely, 2^71993973 is an apocalyptic number.

It is an amenable number.

71993973 is a deficient number, since it is larger than the sum of its proper divisors (24123115).

71993973 is a wasteful number, since it uses less digits than its factorization.

71993973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31283.

The product of its digits is 321489, while the sum is 48.

The square root of 71993973 is about 8484.9262224253. The cubic root of 71993973 is about 416.0051562631.

The spelling of 71993973 in words is "seventy-one million, nine hundred ninety-three thousand, nine hundred seventy-three".