71953613 has 8 divisors (see below), whose sum is σ = 73029600. Its totient is φ = 70882768.

The previous prime is 71953603. The next prime is 71953619. The reversal of 71953613 is 31635917.

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

It is a cyclic number.

It is not a de Polignac number, because 71953613 - 2¹⁰ = 71952589 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 (71953619) 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, 33743 + ... + 35811.

It is an arithmetic number, because the mean of its divisors is an integer number (9128700).

Almost surely, 2^71953613 is an apocalyptic number.

It is an amenable number.

71953613 is a deficient number, since it is larger than the sum of its proper divisors (1075987).

71953613 is a wasteful number, since it uses less digits than its factorization.

71953613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2571.

The product of its digits is 17010, while the sum is 35.

The square root of 71953613 is about 8482.5475536539. The cubic root of 71953613 is about 415.9274038908.

The spelling of 71953613 in words is "seventy-one million, nine hundred fifty-three thousand, six hundred thirteen".