71388149 has 12 divisors (see below), whose sum is σ = 87415200. Its totient is φ = 57968568.

The previous prime is 71388103. The next prime is 71388173. The reversal of 71388149 is 94188317.

It is not a de Polignac number, because 71388149 - 2⁸ = 71387893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71388349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37409 + ... + 39270.

It is an arithmetic number, because the mean of its divisors is an integer number (7284600).

Almost surely, 2^71388149 is an apocalyptic number.

It is an amenable number.

71388149 is a deficient number, since it is larger than the sum of its proper divisors (16027051).

71388149 is a wasteful number, since it uses less digits than its factorization.

71388149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76712 (or 76705 counting only the distinct ones).

The product of its digits is 48384, while the sum is 41.

The square root of 71388149 is about 8449.1507857299. The cubic root of 71388149 is about 414.8349835053.

The spelling of 71388149 in words is "seventy-one million, three hundred eighty-eight thousand, one hundred forty-nine".