78113017 has 4 divisors (see below), whose sum is σ = 78448500. Its totient is φ = 77777536.

The previous prime is 78113003. The next prime is 78113041. The reversal of 78113017 is 71031187.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 71031187 = 4129 ⋅17203.

It can be written as a sum of positive squares in 2 ways, for example, as 48038761 + 30074256 = 6931^2 + 5484^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78113017 is a prime.

It is a super-2 number, since 2×78113017² = 12203286849684578, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78113117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 167392 + ... + 167857.

It is an arithmetic number, because the mean of its divisors is an integer number (19612125).

Almost surely, 2^78113017 is an apocalyptic number.

It is an amenable number.

78113017 is a deficient number, since it is larger than the sum of its proper divisors (335483).

78113017 is a wasteful number, since it uses less digits than its factorization.

78113017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335482.

The product of its (nonzero) digits is 1176, while the sum is 28.

The square root of 78113017 is about 8838.1568779922. The cubic root of 78113017 is about 427.4721288670.

The spelling of 78113017 in words is "seventy-eight million, one hundred thirteen thousand, seventeen".