78503893 has 8 divisors (see below), whose sum is σ = 84768768. Its totient is φ = 72271344.

The previous prime is 78503881. The next prime is 78503903. The reversal of 78503893 is 39830587.

It is a happy number.

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 78503893 - 2¹³ = 78495701 is a prime.

It is a super-2 number, since 2×78503893² = 12325722432310898, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78503693) 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, 2905 + ... + 12862.

It is an arithmetic number, because the mean of its divisors is an integer number (10596096).

Almost surely, 2^78503893 is an apocalyptic number.

It is an amenable number.

78503893 is a deficient number, since it is larger than the sum of its proper divisors (6264875).

78503893 is a wasteful number, since it uses less digits than its factorization.

78503893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16163.

The product of its (nonzero) digits is 181440, while the sum is 43.

The square root of 78503893 is about 8860.2422653108. The cubic root of 78503893 is about 428.1839635556.

The spelling of 78503893 in words is "seventy-eight million, five hundred three thousand, eight hundred ninety-three".