78319403 has 2 divisors, whose sum is σ = 78319404. Its totient is φ = 78319402.

The previous prime is 78319369. The next prime is 78319427. The reversal of 78319403 is 30491387.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78319403 - 2⁸ = 78319147 is a prime.

It is a super-2 number, since 2×78319403² = 12267857772552818, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (78319433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39159701 + 39159702.

It is an arithmetic number, because the mean of its divisors is an integer number (39159702).

Almost surely, 2^78319403 is an apocalyptic number.

78319403 is a deficient number, since it is larger than the sum of its proper divisors (1).

78319403 is an equidigital number, since it uses as much as digits as its factorization.

78319403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 78319403 is about 8849.8250265189. The cubic root of 78319403 is about 427.8482790469.

The spelling of 78319403 in words is "seventy-eight million, three hundred nineteen thousand, four hundred three".