71311953 has 4 divisors (see below), whose sum is σ = 95082608. Its totient is φ = 47541300.

The previous prime is 71311949. The next prime is 71311973. The reversal of 71311953 is 35911317.

It is a happy number.

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.

It is not a de Polignac number, because 71311953 - 2² = 71311949 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 71311953.

It is not an unprimeable number, because it can be changed into a prime (71311973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11885323 + ... + 11885328.

It is an arithmetic number, because the mean of its divisors is an integer number (23770652).

Almost surely, 2^71311953 is an apocalyptic number.

It is an amenable number.

71311953 is a deficient number, since it is larger than the sum of its proper divisors (23770655).

71311953 is a wasteful number, since it uses less digits than its factorization.

71311953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23770654.

The product of its digits is 2835, while the sum is 30.

The square root of 71311953 is about 8444.6404896834. The cubic root of 71311953 is about 414.6873398633.

The spelling of 71311953 in words is "seventy-one million, three hundred eleven thousand, nine hundred fifty-three".