278945063 has 2 divisors, whose sum is σ = 278945064. Its totient is φ = 278945062.

The previous prime is 278945057. The next prime is 278945111. The reversal of 278945063 is 360549872.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 278945063 - 2⁸ = 278944807 is a prime.

It is a super-3 number, since 3×278945063³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (278945003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139472531 + 139472532.

It is an arithmetic number, because the mean of its divisors is an integer number (139472532).

Almost surely, 2^278945063 is an apocalyptic number.

278945063 is a deficient number, since it is larger than the sum of its proper divisors (1).

278945063 is an equidigital number, since it uses as much as digits as its factorization.

278945063 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 362880, while the sum is 44.

The square root of 278945063 is about 16701.6485114494. The cubic root of 278945063 is about 653.3906163909.

The spelling of 278945063 in words is "two hundred seventy-eight million, nine hundred forty-five thousand, sixty-three".