477731609 has 2 divisors, whose sum is σ = 477731610. Its totient is φ = 477731608.

The previous prime is 477731599. The next prime is 477731627. The reversal of 477731609 is 906137774.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 436810000 + 40921609 = 20900^2 + 6397^2 .

It is a cyclic number.

It is not a de Polignac number, because 477731609 - 2¹² = 477727513 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 477731609.

It is not a weakly prime, because it can be changed into another prime (477731629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 238865804 + 238865805.

It is an arithmetic number, because the mean of its divisors is an integer number (238865805).

Almost surely, 2^477731609 is an apocalyptic number.

It is an amenable number.

477731609 is a deficient number, since it is larger than the sum of its proper divisors (1).

477731609 is an equidigital number, since it uses as much as digits as its factorization.

477731609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 222264, while the sum is 44.

The square root of 477731609 is about 21857.0722879346. The cubic root of 477731609 is about 781.7381842771.

The spelling of 477731609 in words is "four hundred seventy-seven million, seven hundred thirty-one thousand, six hundred nine".