71729893 has 4 divisors (see below), whose sum is σ = 74848608. Its totient is φ = 68611180.

The previous prime is 71729887. The next prime is 71729909. The reversal of 71729893 is 39892717.

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 71729893 - 2¹³ = 71721701 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 (71729803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1559323 + ... + 1559368.

It is an arithmetic number, because the mean of its divisors is an integer number (18712152).

Almost surely, 2^71729893 is an apocalyptic number.

It is an amenable number.

71729893 is a deficient number, since it is larger than the sum of its proper divisors (3118715).

71729893 is a wasteful number, since it uses less digits than its factorization.

71729893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3118714.

The product of its digits is 190512, while the sum is 46.

The square root of 71729893 is about 8469.3502112027. The cubic root of 71729893 is about 415.4958856715.

The spelling of 71729893 in words is "seventy-one million, seven hundred twenty-nine thousand, eight hundred ninety-three".