71401133 has 4 divisors (see below), whose sum is σ = 71418048. Its totient is φ = 71384220.

The previous prime is 71401129. The next prime is 71401181. The reversal of 71401133 is 33110417.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 71401133 - 2² = 71401129 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 (71401193) 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, 3710 + ... + 12512.

It is an arithmetic number, because the mean of its divisors is an integer number (17854512).

Almost surely, 2^71401133 is an apocalyptic number.

It is an amenable number.

71401133 is a deficient number, since it is larger than the sum of its proper divisors (16915).

71401133 is an equidigital number, since it uses as much as digits as its factorization.

71401133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16914.

The product of its (nonzero) digits is 252, while the sum is 20.

The square root of 71401133 is about 8449.9191120389. The cubic root of 71401133 is about 414.8601318947.

The spelling of 71401133 in words is "seventy-one million, four hundred one thousand, one hundred thirty-three".