78287365903 has 2 divisors, whose sum is σ = 78287365904. Its totient is φ = 78287365902.

The previous prime is 78287365853. The next prime is 78287365997. The reversal of 78287365903 is 30956378287.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78287365903 - 2³³ = 69697431311 is a prime.

It is a super-2 number, since 2×78287365903² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78287365003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39143682951 + 39143682952.

It is an arithmetic number, because the mean of its divisors is an integer number (39143682952).

Almost surely, 2^78287365903 is an apocalyptic number.

78287365903 is a deficient number, since it is larger than the sum of its proper divisors (1).

78287365903 is an equidigital number, since it uses as much as digits as its factorization.

78287365903 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15240960, while the sum is 58.

The spelling of 78287365903 in words is "seventy-eight billion, two hundred eighty-seven million, three hundred sixty-five thousand, nine hundred three".