78046417 has 4 divisors (see below), whose sum is σ = 79115620. Its totient is φ = 76977216.

The previous prime is 78046403. The next prime is 78046421. The reversal of 78046417 is 71464087.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 71464087 = 53 ⋅1348379.

It can be written as a sum of positive squares in 2 ways, for example, as 61716736 + 16329681 = 7856^2 + 4041^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78046417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78046457) 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 3 ways as a sum of consecutive naturals, for example, 534492 + ... + 534637.

It is an arithmetic number, because the mean of its divisors is an integer number (19778905).

Almost surely, 2^78046417 is an apocalyptic number.

It is an amenable number.

78046417 is a deficient number, since it is larger than the sum of its proper divisors (1069203).

78046417 is a wasteful number, since it uses less digits than its factorization.

78046417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1069202.

The product of its (nonzero) digits is 37632, while the sum is 37.

The square root of 78046417 is about 8834.3883206479. The cubic root of 78046417 is about 427.3506052086.

The spelling of 78046417 in words is "seventy-eight million, forty-six thousand, four hundred seventeen".