478857349 has 2 divisors, whose sum is σ = 478857350. Its totient is φ = 478857348.

The previous prime is 478857329. The next prime is 478857359. The reversal of 478857349 is 943758874.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 378497025 + 100360324 = 19455^2 + 10018^2 .

It is a cyclic number.

It is not a de Polignac number, because 478857349 - 2⁵ = 478857317 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 478857349.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (478857319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239428674 + 239428675.

It is an arithmetic number, because the mean of its divisors is an integer number (239428675).

Almost surely, 2^478857349 is an apocalyptic number.

It is an amenable number.

478857349 is a deficient number, since it is larger than the sum of its proper divisors (1).

478857349 is an equidigital number, since it uses as much as digits as its factorization.

478857349 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6773760, while the sum is 55.

The square root of 478857349 is about 21882.8094402890. The cubic root of 478857349 is about 782.3517391023.

The spelling of 478857349 in words is "four hundred seventy-eight million, eight hundred fifty-seven thousand, three hundred forty-nine".