78513403 has 2 divisors, whose sum is σ = 78513404. Its totient is φ = 78513402.

The previous prime is 78513373. The next prime is 78513419. The reversal of 78513403 is 30431587.

It is a strong prime.

It is an emirp because it is prime and its reverse (30431587) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78513403 - 2⁹ = 78512891 is a prime.

It is a super-3 number, since 3×78513403³ (a number of 25 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (78513443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39256701 + 39256702.

It is an arithmetic number, because the mean of its divisors is an integer number (39256702).

Almost surely, 2^78513403 is an apocalyptic number.

78513403 is a deficient number, since it is larger than the sum of its proper divisors (1).

78513403 is an equidigital number, since it uses as much as digits as its factorization.

78513403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 78513403 is about 8860.7789160999. The cubic root of 78513403 is about 428.2012529957.

The spelling of 78513403 in words is "seventy-eight million, five hundred thirteen thousand, four hundred three".