78455803 has 2 divisors, whose sum is σ = 78455804. Its totient is φ = 78455802.

The previous prime is 78455791. The next prime is 78455809. The reversal of 78455803 is 30855487.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78455803 - 2⁵ = 78455771 is a prime.

It is not a weakly prime, because it can be changed into another prime (78455809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39227901 + 39227902.

It is an arithmetic number, because the mean of its divisors is an integer number (39227902).

Almost surely, 2^78455803 is an apocalyptic number.

78455803 is a deficient number, since it is larger than the sum of its proper divisors (1).

78455803 is an equidigital number, since it uses as much as digits as its factorization.

78455803 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 134400, while the sum is 40.

The square root of 78455803 is about 8857.5280411636. The cubic root of 78455803 is about 428.0965132306.

The spelling of 78455803 in words is "seventy-eight million, four hundred fifty-five thousand, eight hundred three".