427979449 has 2 divisors, whose sum is σ = 427979450. Its totient is φ = 427979448.

The previous prime is 427979413. The next prime is 427979467. The reversal of 427979449 is 944979724.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 427869225 + 110224 = 20685^2 + 332^2 .

It is a cyclic number.

It is not a de Polignac number, because 427979449 - 2⁹ = 427978937 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 427979449.

It is not a weakly prime, because it can be changed into another prime (427979479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213989724 + 213989725.

It is an arithmetic number, because the mean of its divisors is an integer number (213989725).

Almost surely, 2^427979449 is an apocalyptic number.

It is an amenable number.

427979449 is a deficient number, since it is larger than the sum of its proper divisors (1).

427979449 is an equidigital number, since it uses as much as digits as its factorization.

427979449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4572288, while the sum is 55.

The square root of 427979449 is about 20687.6641745751. The cubic root of 427979449 is about 753.6001422424.

The spelling of 427979449 in words is "four hundred twenty-seven million, nine hundred seventy-nine thousand, four hundred forty-nine".