71477953 has 4 divisors (see below), whose sum is σ = 73942740. Its totient is φ = 69013168.

The previous prime is 71477933. The next prime is 71477963. The reversal of 71477953 is 35977417.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 22014864 + 49463089 = 4692^2 + 7033^2 .

It is a cyclic number.

It is not a de Polignac number, because 71477953 - 2²⁵ = 37923521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71477933) 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, 1232350 + ... + 1232407.

It is an arithmetic number, because the mean of its divisors is an integer number (18485685).

Almost surely, 2^71477953 is an apocalyptic number.

It is an amenable number.

71477953 is a deficient number, since it is larger than the sum of its proper divisors (2464787).

71477953 is a wasteful number, since it uses less digits than its factorization.

71477953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2464786.

The product of its digits is 185220, while the sum is 43.

The square root of 71477953 is about 8454.4634956927. The cubic root of 71477953 is about 415.0088603131.

The spelling of 71477953 in words is "seventy-one million, four hundred seventy-seven thousand, nine hundred fifty-three".