78383613 has 16 divisors (see below), whose sum is σ = 130300416. Its totient is φ = 40718640.

The previous prime is 78383611. The next prime is 78383659. The reversal of 78383613 is 31638387.

It is not a de Polignac number, because 78383613 - 2¹ = 78383611 is a prime.

It is a super-2 number, since 2×78383613² = 12287981573867538, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78383611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 169431 + ... + 169892.

It is an arithmetic number, because the mean of its divisors is an integer number (8143776).

Almost surely, 2^78383613 is an apocalyptic number.

It is an amenable number.

78383613 is a deficient number, since it is larger than the sum of its proper divisors (51916803).

78383613 is a wasteful number, since it uses less digits than its factorization.

78383613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339344.

The product of its digits is 72576, while the sum is 39.

The square root of 78383613 is about 8853.4520386118. The cubic root of 78383613 is about 427.9651706161.

The spelling of 78383613 in words is "seventy-eight million, three hundred eighty-three thousand, six hundred thirteen".