71178379 has 4 divisors (see below), whose sum is σ = 71332576. Its totient is φ = 71024184.

The previous prime is 71178377. The next prime is 71178403. The reversal of 71178379 is 97387117.

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 71178379 - 2¹ = 71178377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71178377) 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, 76404 + ... + 77329.

It is an arithmetic number, because the mean of its divisors is an integer number (17833144).

Almost surely, 2^71178379 is an apocalyptic number.

71178379 is a deficient number, since it is larger than the sum of its proper divisors (154197).

71178379 is a wasteful number, since it uses less digits than its factorization.

71178379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154196.

The product of its digits is 74088, while the sum is 43.

The square root of 71178379 is about 8436.7279794954. The cubic root of 71178379 is about 414.4282618972.

The spelling of 71178379 in words is "seventy-one million, one hundred seventy-eight thousand, three hundred seventy-nine".