78303513 has 8 divisors (see below), whose sum is σ = 110546208. Its totient is φ = 49131584.

The previous prime is 78303493. The next prime is 78303527. The reversal of 78303513 is 31530387.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 78303513 - 2¹⁰ = 78302489 is a prime.

It is a super-2 number, since 2×78303513² = 12262880296282338, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (78303413) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 767631 + ... + 767732.

It is an arithmetic number, because the mean of its divisors is an integer number (13818276).

Almost surely, 2^78303513 is an apocalyptic number.

It is an amenable number.

78303513 is a deficient number, since it is larger than the sum of its proper divisors (32242695).

78303513 is a wasteful number, since it uses less digits than its factorization.

78303513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1535383.

The product of its (nonzero) digits is 7560, while the sum is 30.

The square root of 78303513 is about 8848.9272231158. The cubic root of 78303513 is about 427.8193421180.

The spelling of 78303513 in words is "seventy-eight million, three hundred three thousand, five hundred thirteen".