78248017 has 4 divisors (see below), whose sum is σ = 78716736. Its totient is φ = 77779300.

The previous prime is 78248011. The next prime is 78248021. The reversal of 78248017 is 71084287.

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 a cyclic number.

It is not a de Polignac number, because 78248017 - 2¹¹ = 78245969 is a prime.

It is a super-2 number, since 2×78248017² = 12245504328864578, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78248011) 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, 234109 + ... + 234442.

It is an arithmetic number, because the mean of its divisors is an integer number (19679184).

Almost surely, 2^78248017 is an apocalyptic number.

It is an amenable number.

78248017 is a deficient number, since it is larger than the sum of its proper divisors (468719).

78248017 is a wasteful number, since it uses less digits than its factorization.

78248017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468718.

The product of its (nonzero) digits is 25088, while the sum is 37.

The square root of 78248017 is about 8845.7909199800. The cubic root of 78248017 is about 427.7182488530.

The spelling of 78248017 in words is "seventy-eight million, two hundred forty-eight thousand, seventeen".