71497723 has 4 divisors (see below), whose sum is σ = 77997528. Its totient is φ = 64997920.

The previous prime is 71497667. The next prime is 71497729. The reversal of 71497723 is 32779417.

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 71497723 - 2²¹ = 69400571 is a prime.

It is a super-2 number, since 2×71497723² = 10223848788369458, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71497729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3249886 + ... + 3249907.

It is an arithmetic number, because the mean of its divisors is an integer number (19499382).

Almost surely, 2^71497723 is an apocalyptic number.

71497723 is a deficient number, since it is larger than the sum of its proper divisors (6499805).

71497723 is a wasteful number, since it uses less digits than its factorization.

71497723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6499804.

The product of its digits is 74088, while the sum is 40.

The square root of 71497723 is about 8455.6326197393. The cubic root of 71497723 is about 415.0471190511.

It can be divided in two parts, 71 and 497723, that added together give a palindrome (497794).

The spelling of 71497723 in words is "seventy-one million, four hundred ninety-seven thousand, seven hundred twenty-three".