278498989147 has 2 divisors, whose sum is σ = 278498989148. Its totient is φ = 278498989146.

The previous prime is 278498989133. The next prime is 278498989157. The reversal of 278498989147 is 741989894872.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-278498989147 is a prime.

It is not a weakly prime, because it can be changed into another prime (278498989157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139249494573 + 139249494574.

It is an arithmetic number, because the mean of its divisors is an integer number (139249494574).

Almost surely, 2^278498989147 is an apocalyptic number.

278498989147 is a deficient number, since it is larger than the sum of its proper divisors (1).

278498989147 is an equidigital number, since it uses as much as digits as its factorization.

278498989147 is an evil number, because the sum of its binary digits is even.

The product of its digits is 585252864, while the sum is 76.

The spelling of 278498989147 in words is "two hundred seventy-eight billion, four hundred ninety-eight million, nine hundred eighty-nine thousand, one hundred forty-seven".