71380787 has 4 divisors (see below), whose sum is σ = 72358680. Its totient is φ = 70402896.

The previous prime is 71380781. The next prime is 71380801. The reversal of 71380787 is 78708317.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 71380787 - 2²⁶ = 4271923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71380781) 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, 488837 + ... + 488982.

It is an arithmetic number, because the mean of its divisors is an integer number (18089670).

Almost surely, 2^71380787 is an apocalyptic number.

71380787 is a deficient number, since it is larger than the sum of its proper divisors (977893).

71380787 is an equidigital number, since it uses as much as digits as its factorization.

71380787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 977892.

The product of its (nonzero) digits is 65856, while the sum is 41.

The square root of 71380787 is about 8448.7151094116. The cubic root of 71380787 is about 414.8207228743.

The spelling of 71380787 in words is "seventy-one million, three hundred eighty thousand, seven hundred eighty-seven".