71493071 has 4 divisors (see below), whose sum is σ = 76992552. Its totient is φ = 65993592.

The previous prime is 71493049. The next prime is 71493089. The reversal of 71493071 is 17039417.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 71493071 - 2¹⁸ = 71230927 is a prime.

It is a super-2 number, since 2×71493071² = 10222518402022082, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71493001) 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, 2749721 + ... + 2749746.

It is an arithmetic number, because the mean of its divisors is an integer number (19248138).

Almost surely, 2^71493071 is an apocalyptic number.

71493071 is a deficient number, since it is larger than the sum of its proper divisors (5499481).

71493071 is a wasteful number, since it uses less digits than its factorization.

71493071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5499480.

The product of its (nonzero) digits is 5292, while the sum is 32.

The square root of 71493071 is about 8455.3575323578. The cubic root of 71493071 is about 415.0381171744.

The spelling of 71493071 in words is "seventy-one million, four hundred ninety-three thousand, seventy-one".