71388101 has 4 divisors (see below), whose sum is σ = 71616492. Its totient is φ = 71159712.

The previous prime is 71388077. The next prime is 71388103. The reversal of 71388101 is 10188317.

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 390625 + 70997476 = 625^2 + 8426^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71388101 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 (71388103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 113726 + ... + 114351.

It is an arithmetic number, because the mean of its divisors is an integer number (17904123).

Almost surely, 2^71388101 is an apocalyptic number.

It is an amenable number.

71388101 is a deficient number, since it is larger than the sum of its proper divisors (228391).

71388101 is a wasteful number, since it uses less digits than its factorization.

71388101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228390.

The product of its (nonzero) digits is 1344, while the sum is 29.

The square root of 71388101 is about 8449.1479452073. The cubic root of 71388101 is about 414.8348905296.

The spelling of 71388101 in words is "seventy-one million, three hundred eighty-eight thousand, one hundred one".