78473769 has 16 divisors (see below), whose sum is σ = 119107584. Its totient is φ = 45491600.

The previous prime is 78473767. The next prime is 78473771. The reversal of 78473769 is 96737487.

It is an interprime number because it is at equal distance from previous prime (78473767) and next prime (78473771).

It is not a de Polignac number, because 78473769 - 2¹ = 78473767 is a prime.

It is a super-2 number, since 2×78473769² = 12316264842130722, which contains 22 as substring.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (78473767) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50937 + ... + 52454.

It is an arithmetic number, because the mean of its divisors is an integer number (7444224).

Almost surely, 2^78473769 is an apocalyptic number.

It is an amenable number.

78473769 is a deficient number, since it is larger than the sum of its proper divisors (40633815).

78473769 is a wasteful number, since it uses less digits than its factorization.

78473769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103428.

The product of its digits is 1778112, while the sum is 51.

The square root of 78473769 is about 8858.5421486834. The cubic root of 78473769 is about 428.1291880813.

The spelling of 78473769 in words is "seventy-eight million, four hundred seventy-three thousand, seven hundred sixty-nine".