78473871 has 12 divisors (see below), whose sum is σ = 129544272. Its totient is φ = 44842176.

The previous prime is 78473851. The next prime is 78473891. The reversal of 78473871 is 17837487.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (78473851) and next prime (78473891).

It is not a de Polignac number, because 78473871 - 2⁶ = 78473807 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78473821) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 622746 + ... + 622871.

It is an arithmetic number, because the mean of its divisors is an integer number (10795356).

Almost surely, 2^78473871 is an apocalyptic number.

78473871 is a deficient number, since it is larger than the sum of its proper divisors (51070401).

78473871 is a wasteful number, since it uses less digits than its factorization.

78473871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1245630 (or 1245627 counting only the distinct ones).

The product of its digits is 263424, while the sum is 45.

The square root of 78473871 is about 8858.5479058365. The cubic root of 78473871 is about 428.1293735749.

The spelling of 78473871 in words is "seventy-eight million, four hundred seventy-three thousand, eight hundred seventy-one".