478372513 has 2 divisors, whose sum is σ = 478372514. Its totient is φ = 478372512.

The previous prime is 478372493. The next prime is 478372523. The reversal of 478372513 is 315273874.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 460875024 + 17497489 = 21468^2 + 4183^2 .

It is a cyclic number.

It is not a de Polignac number, because 478372513 - 2²¹ = 476275361 is a prime.

It is a super-2 number, since 2×478372513² = 457680522387870338, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (478372523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239186256 + 239186257.

It is an arithmetic number, because the mean of its divisors is an integer number (239186257).

Almost surely, 2^478372513 is an apocalyptic number.

It is an amenable number.

478372513 is a deficient number, since it is larger than the sum of its proper divisors (1).

478372513 is an equidigital number, since it uses as much as digits as its factorization.

478372513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 141120, while the sum is 40.

The square root of 478372513 is about 21871.7286239565. The cubic root of 478372513 is about 782.0876100761.

The spelling of 478372513 in words is "four hundred seventy-eight million, three hundred seventy-two thousand, five hundred thirteen".