71940787 has 4 divisors (see below), whose sum is σ = 76172616. Its totient is φ = 67708960.

The previous prime is 71940731. The next prime is 71940809. The reversal of 71940787 is 78704917.

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

It is a de Polignac number, because none of the positive numbers 2^k-71940787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71940727) 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, 2115889 + ... + 2115922.

It is an arithmetic number, because the mean of its divisors is an integer number (19043154).

Almost surely, 2^71940787 is an apocalyptic number.

71940787 is a deficient number, since it is larger than the sum of its proper divisors (4231829).

71940787 is a wasteful number, since it uses less digits than its factorization.

71940787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4231828.

The product of its (nonzero) digits is 98784, while the sum is 43.

The square root of 71940787 is about 8481.7914970836. The cubic root of 71940787 is about 415.9026888850.

It can be divided in two parts, 71940 and 787, that added together give a palindrome (72727).

The spelling of 71940787 in words is "seventy-one million, nine hundred forty thousand, seven hundred eighty-seven".