78503313 has 8 divisors (see below), whose sum is σ = 119624128. Its totient is φ = 44859024.

The previous prime is 78503303. The next prime is 78503323. The reversal of 78503313 is 31330587.

It is an interprime number because it is at equal distance from previous prime (78503303) and next prime (78503323).

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

It is not a de Polignac number, because 78503313 - 2¹³ = 78495121 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (78503303) 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, 1869106 + ... + 1869147.

It is an arithmetic number, because the mean of its divisors is an integer number (14953016).

Almost surely, 2^78503313 is an apocalyptic number.

It is an amenable number.

78503313 is a deficient number, since it is larger than the sum of its proper divisors (41120815).

78503313 is a wasteful number, since it uses less digits than its factorization.

78503313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3738263.

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

The square root of 78503313 is about 8860.2095347684. The cubic root of 78503313 is about 428.1829090545.

The spelling of 78503313 in words is "seventy-eight million, five hundred three thousand, three hundred thirteen".