547278649 has 2 divisors, whose sum is σ = 547278650. Its totient is φ = 547278648.

The previous prime is 547278623. The next prime is 547278703. The reversal of 547278649 is 946872745.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 419430400 + 127848249 = 20480^2 + 11307^2 .

It is a cyclic number.

It is not a de Polignac number, because 547278649 - 2⁷ = 547278521 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 547278596 and 547278605.

It is not a weakly prime, because it can be changed into another prime (547270649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 273639324 + 273639325.

It is an arithmetic number, because the mean of its divisors is an integer number (273639325).

Almost surely, 2^547278649 is an apocalyptic number.

It is an amenable number.

547278649 is a deficient number, since it is larger than the sum of its proper divisors (1).

547278649 is an equidigital number, since it uses as much as digits as its factorization.

547278649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3386880, while the sum is 52.

The square root of 547278649 is about 23393.9874540447. The cubic root of 547278649 is about 817.9677261833.

The spelling of 547278649 in words is "five hundred forty-seven million, two hundred seventy-eight thousand, six hundred forty-nine".