78083771 has 8 divisors (see below), whose sum is σ = 82792224. Its totient is φ = 73388160.

The previous prime is 78083767. The next prime is 78083773. The reversal of 78083771 is 17738087.

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 78083771 - 2² = 78083767 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78083773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11201 + ... + 16781.

It is an arithmetic number, because the mean of its divisors is an integer number (10349028).

Almost surely, 2^78083771 is an apocalyptic number.

78083771 is a deficient number, since it is larger than the sum of its proper divisors (4708453).

78083771 is a wasteful number, since it uses less digits than its factorization.

78083771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6421.

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

The square root of 78083771 is about 8836.5021926099. The cubic root of 78083771 is about 427.4187727985.

The spelling of 78083771 in words is "seventy-eight million, eighty-three thousand, seven hundred seventy-one".