278464951 has 2 divisors, whose sum is σ = 278464952. Its totient is φ = 278464950.

The previous prime is 278464937. The next prime is 278464957. The reversal of 278464951 is 159464872.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 278464951 - 2⁵ = 278464919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (278464957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139232475 + 139232476.

It is an arithmetic number, because the mean of its divisors is an integer number (139232476).

Almost surely, 2^278464951 is an apocalyptic number.

278464951 is a deficient number, since it is larger than the sum of its proper divisors (1).

278464951 is an equidigital number, since it uses as much as digits as its factorization.

278464951 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 483840, while the sum is 46.

The square root of 278464951 is about 16687.2691294891. The cubic root of 278464951 is about 653.0155355751.

The spelling of 278464951 in words is "two hundred seventy-eight million, four hundred sixty-four thousand, nine hundred fifty-one".