278223200987 has 2 divisors, whose sum is σ = 278223200988. Its totient is φ = 278223200986.

The previous prime is 278223200947. The next prime is 278223201013. The reversal of 278223200987 is 789002322872.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 278223200987 - 2⁶ = 278223200923 is a prime.

It is not a weakly prime, because it can be changed into another prime (278223200947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139111600493 + 139111600494.

It is an arithmetic number, because the mean of its divisors is an integer number (139111600494).

Almost surely, 2^278223200987 is an apocalyptic number.

278223200987 is a deficient number, since it is larger than the sum of its proper divisors (1).

278223200987 is an equidigital number, since it uses as much as digits as its factorization.

278223200987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1354752, while the sum is 50.

The spelling of 278223200987 in words is "two hundred seventy-eight billion, two hundred twenty-three million, two hundred thousand, nine hundred eighty-seven".