78990503 has 16 divisors (see below), whose sum is σ = 82736640. Its totient is φ = 75363456.

The previous prime is 78990497. The next prime is 78990529. The reversal of 78990503 is 30509987.

It is a cyclic number.

It is not a de Polignac number, because 78990503 - 2²² = 74796199 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78990563) 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, 568208 + ... + 568346.

It is an arithmetic number, because the mean of its divisors is an integer number (5171040).

Almost surely, 2^78990503 is an apocalyptic number.

78990503 is a deficient number, since it is larger than the sum of its proper divisors (3746137).

78990503 is a wasteful number, since it uses less digits than its factorization.

78990503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406.

The product of its (nonzero) digits is 68040, while the sum is 41.

The square root of 78990503 is about 8887.6601532687. The cubic root of 78990503 is about 429.0668478737.

The spelling of 78990503 in words is "seventy-eight million, nine hundred ninety thousand, five hundred three".