71392149 has 6 divisors (see below), whose sum is σ = 103122006. Its totient is φ = 47594760.

The previous prime is 71392141. The next prime is 71392187. The reversal of 71392149 is 94129317.

It can be written as a sum of positive squares in only one way, i.e., 70257924 + 1134225 = 8382^2 + 1065^2 .

It is not a de Polignac number, because 71392149 - 2³ = 71392141 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71392141) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3966222 + ... + 3966239.

It is an arithmetic number, because the mean of its divisors is an integer number (17187001).

Almost surely, 2^71392149 is an apocalyptic number.

It is an amenable number.

71392149 is a deficient number, since it is larger than the sum of its proper divisors (31729857).

71392149 is a wasteful number, since it uses less digits than its factorization.

71392149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7932467 (or 7932464 counting only the distinct ones).

The product of its digits is 13608, while the sum is 36.

The square root of 71392149 is about 8449.3874925938. The cubic root of 71392149 is about 414.8427313316.

The spelling of 71392149 in words is "seventy-one million, three hundred ninety-two thousand, one hundred forty-nine".