478131947 has 2 divisors, whose sum is σ = 478131948. Its totient is φ = 478131946.

The previous prime is 478131917. The next prime is 478131977. The reversal of 478131947 is 749131874.

It is a balanced prime because it is at equal distance from previous prime (478131917) and next prime (478131977).

It is a cyclic number.

It is not a de Polignac number, because 478131947 - 2¹⁸ = 477869803 is a prime.

It is a super-2 number, since 2×478131947² = 457220317484021618, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 478131898 and 478131907.

It is not a weakly prime, because it can be changed into another prime (478131917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239065973 + 239065974.

It is an arithmetic number, because the mean of its divisors is an integer number (239065974).

Almost surely, 2^478131947 is an apocalyptic number.

478131947 is a deficient number, since it is larger than the sum of its proper divisors (1).

478131947 is an equidigital number, since it uses as much as digits as its factorization.

478131947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 169344, while the sum is 44.

The square root of 478131947 is about 21866.2284585157. The cubic root of 478131947 is about 781.9564882482.

The spelling of 478131947 in words is "four hundred seventy-eight million, one hundred thirty-one thousand, nine hundred forty-seven".