278479153 has 2 divisors, whose sum is σ = 278479154. Its totient is φ = 278479152.

The previous prime is 278479129. The next prime is 278479171. The reversal of 278479153 is 351974872.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 276324129 + 2155024 = 16623^2 + 1468^2 .

It is a cyclic number.

It is not a de Polignac number, because 278479153 - 2²⁵ = 244924721 is a prime.

It is not a weakly prime, because it can be changed into another prime (278479753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139239576 + 139239577.

It is an arithmetic number, because the mean of its divisors is an integer number (139239577).

Almost surely, 2^278479153 is an apocalyptic number.

It is an amenable number.

278479153 is a deficient number, since it is larger than the sum of its proper divisors (1).

278479153 is an equidigital number, since it uses as much as digits as its factorization.

278479153 is an evil number, because the sum of its binary digits is even.

The product of its digits is 423360, while the sum is 46.

The square root of 278479153 is about 16687.6946580407. The cubic root of 278479153 is about 653.0266368753.

The spelling of 278479153 in words is "two hundred seventy-eight million, four hundred seventy-nine thousand, one hundred fifty-three".