478746137 has 2 divisors, whose sum is σ = 478746138. Its totient is φ = 478746136.

The previous prime is 478746131. The next prime is 478746139. The reversal of 478746137 is 731647874.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 366301321 + 112444816 = 19139^2 + 10604^2 .

It is a cyclic number.

It is not a de Polignac number, because 478746137 - 2¹⁴ = 478729753 is a prime.

Together with 478746139, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 478746091 and 478746100.

It is not a weakly prime, because it can be changed into another prime (478746131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239373068 + 239373069.

It is an arithmetic number, because the mean of its divisors is an integer number (239373069).

Almost surely, 2^478746137 is an apocalyptic number.

It is an amenable number.

478746137 is a deficient number, since it is larger than the sum of its proper divisors (1).

478746137 is an equidigital number, since it uses as much as digits as its factorization.

478746137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 790272, while the sum is 47.

The square root of 478746137 is about 21880.2682113360. The cubic root of 478746137 is about 782.2911687757.

The spelling of 478746137 in words is "four hundred seventy-eight million, seven hundred forty-six thousand, one hundred thirty-seven".