71677391 has 8 divisors (see below), whose sum is σ = 72658560. Its totient is φ = 70701912.

The previous prime is 71677387. The next prime is 71677393. The reversal of 71677391 is 19377617.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 71677391 - 2² = 71677387 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 (71677393) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27920 + ... + 30378.

It is an arithmetic number, because the mean of its divisors is an integer number (9082320).

Almost surely, 2^71677391 is an apocalyptic number.

71677391 is a deficient number, since it is larger than the sum of its proper divisors (981169).

71677391 is a wasteful number, since it uses less digits than its factorization.

71677391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2845.

The product of its digits is 55566, while the sum is 41.

The square root of 71677391 is about 8466.2501144249. The cubic root of 71677391 is about 415.3944881996.

The spelling of 71677391 in words is "seventy-one million, six hundred seventy-seven thousand, three hundred ninety-one".