71971793 has 4 divisors (see below), whose sum is σ = 72521328. Its totient is φ = 71422260.

The previous prime is 71971787. The next prime is 71971811. The reversal of 71971793 is 39717917.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 71971793 - 2⁶ = 71971729 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (71971763) 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, 274571 + ... + 274832.

It is an arithmetic number, because the mean of its divisors is an integer number (18130332).

Almost surely, 2^71971793 is an apocalyptic number.

It is an amenable number.

71971793 is a deficient number, since it is larger than the sum of its proper divisors (549535).

71971793 is a wasteful number, since it uses less digits than its factorization.

71971793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 549534.

The product of its digits is 83349, while the sum is 44.

The square root of 71971793 is about 8483.6190980029. The cubic root of 71971793 is about 415.9624307326.

The spelling of 71971793 in words is "seventy-one million, nine hundred seventy-one thousand, seven hundred ninety-three".