278140801 has 2 divisors, whose sum is σ = 278140802. Its totient is φ = 278140800.

The previous prime is 278140789. The next prime is 278140823. The reversal of 278140801 is 108041872.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 271458576 + 6682225 = 16476^2 + 2585^2 .

It is a cyclic number.

It is not a de Polignac number, because 278140801 - 2²⁵ = 244586369 is a prime.

It is not a weakly prime, because it can be changed into another prime (278140831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139070400 + 139070401.

It is an arithmetic number, because the mean of its divisors is an integer number (139070401).

Almost surely, 2^278140801 is an apocalyptic number.

It is an amenable number.

278140801 is a deficient number, since it is larger than the sum of its proper divisors (1).

278140801 is an equidigital number, since it uses as much as digits as its factorization.

278140801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3584, while the sum is 31.

The square root of 278140801 is about 16677.5538074383. The cubic root of 278140801 is about 652.7620540360.

The spelling of 278140801 in words is "two hundred seventy-eight million, one hundred forty thousand, eight hundred one".