71971437 has 8 divisors (see below), whose sum is σ = 96459904. Its totient is φ = 47731968.

The previous prime is 71971423. The next prime is 71971451. The reversal of 71971437 is 73417917.

It is an interprime number because it is at equal distance from previous prime (71971423) and next prime (71971451).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 71971437 - 2¹⁰ = 71970413 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71971395 and 71971404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71971457) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61573 + ... + 62730.

It is an arithmetic number, because the mean of its divisors is an integer number (12057488).

Almost surely, 2^71971437 is an apocalyptic number.

It is an amenable number.

71971437 is a deficient number, since it is larger than the sum of its proper divisors (24488467).

71971437 is a wasteful number, since it uses less digits than its factorization.

71971437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124499.

The product of its digits is 37044, while the sum is 39.

The square root of 71971437 is about 8483.5981163655. The cubic root of 71971437 is about 415.9617448950.

The spelling of 71971437 in words is "seventy-one million, nine hundred seventy-one thousand, four hundred thirty-seven".