71397653 has 4 divisors (see below), whose sum is σ = 72916800. Its totient is φ = 69878508.

The previous prime is 71397647. The next prime is 71397661. The reversal of 71397653 is 35679317.

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, and also an emirpimes, since its reverse is a distinct semiprime: 35679317 = 349 ⋅102233.

It is a cyclic number.

It is not a de Polignac number, because 71397653 - 2¹⁰ = 71396629 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 71397653.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71397353) 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, 759503 + ... + 759596.

It is an arithmetic number, because the mean of its divisors is an integer number (18229200).

Almost surely, 2^71397653 is an apocalyptic number.

It is an amenable number.

71397653 is a deficient number, since it is larger than the sum of its proper divisors (1519147).

71397653 is a wasteful number, since it uses less digits than its factorization.

71397653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1519146.

The product of its digits is 119070, while the sum is 41.

The square root of 71397653 is about 8449.7131903988. The cubic root of 71397653 is about 414.8533918676.

The spelling of 71397653 in words is "seventy-one million, three hundred ninety-seven thousand, six hundred fifty-three".