78132503 has 4 divisors (see below), whose sum is σ = 82244760. Its totient is φ = 74020248.

The previous prime is 78132491. The next prime is 78132517. The reversal of 78132503 is 30523187.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30523187 = 37 ⋅824951.

It is a cyclic number.

It is not a de Polignac number, because 78132503 - 2⁴ = 78132487 is a prime.

It is a super-2 number, since 2×78132503² = 12209376050090018, 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 (78132563) 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, 2056100 + ... + 2056137.

It is an arithmetic number, because the mean of its divisors is an integer number (20561190).

Almost surely, 2^78132503 is an apocalyptic number.

78132503 is a deficient number, since it is larger than the sum of its proper divisors (4112257).

78132503 is a wasteful number, since it uses less digits than its factorization.

78132503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4112256.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 78132503 is about 8839.2591884162. The cubic root of 78132503 is about 427.5076715106.

The spelling of 78132503 in words is "seventy-eight million, one hundred thirty-two thousand, five hundred three".