71117487 has 16 divisors (see below), whose sum is σ = 120410880. Its totient is φ = 40638456.

The previous prime is 71117419. The next prime is 71117489. The reversal of 71117487 is 78471117.

It is a happy number.

It is not a de Polignac number, because 71117487 - 2¹¹ = 71115439 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71117489) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 187953 + ... + 188330.

It is an arithmetic number, because the mean of its divisors is an integer number (7525680).

Almost surely, 2^71117487 is an apocalyptic number.

71117487 is a deficient number, since it is larger than the sum of its proper divisors (49293393).

71117487 is a wasteful number, since it uses less digits than its factorization.

71117487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376299 (or 376293 counting only the distinct ones).

The product of its digits is 10976, while the sum is 36.

The square root of 71117487 is about 8433.1184623483. The cubic root of 71117487 is about 414.3100491962.

The spelling of 71117487 in words is "seventy-one million, one hundred seventeen thousand, four hundred eighty-seven".