78471093 has 4 divisors (see below), whose sum is σ = 104628128. Its totient is φ = 52314060.

The previous prime is 78471079. The next prime is 78471103. The reversal of 78471093 is 39017487.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 78471093 - 2⁵ = 78471061 is a prime.

It is a super-2 number, since 2×78471093² = 12315424873229298, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78471023) 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 3 ways as a sum of consecutive naturals, for example, 13078513 + ... + 13078518.

It is an arithmetic number, because the mean of its divisors is an integer number (26157032).

Almost surely, 2^78471093 is an apocalyptic number.

It is an amenable number.

78471093 is a deficient number, since it is larger than the sum of its proper divisors (26157035).

78471093 is a wasteful number, since it uses less digits than its factorization.

78471093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26157034.

The product of its (nonzero) digits is 42336, while the sum is 39.

The square root of 78471093 is about 8858.3911067417. The cubic root of 78471093 is about 428.1243215433.

The spelling of 78471093 in words is "seventy-eight million, four hundred seventy-one thousand, ninety-three".