478164749 has 2 divisors, whose sum is σ = 478164750. Its totient is φ = 478164748.

The previous prime is 478164707. The next prime is 478164767. The reversal of 478164749 is 947461874.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 313042249 + 165122500 = 17693^2 + 12850^2 .

It is a cyclic number.

It is not a de Polignac number, because 478164749 - 2¹² = 478160653 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 478164697 and 478164706.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (478164649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239082374 + 239082375.

It is an arithmetic number, because the mean of its divisors is an integer number (239082375).

Almost surely, 2^478164749 is an apocalyptic number.

It is an amenable number.

478164749 is a deficient number, since it is larger than the sum of its proper divisors (1).

478164749 is an equidigital number, since it uses as much as digits as its factorization.

478164749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1354752, while the sum is 50.

The square root of 478164749 is about 21866.9785064146. The cubic root of 478164749 is about 781.9743697489.

The spelling of 478164749 in words is "four hundred seventy-eight million, one hundred sixty-four thousand, seven hundred forty-nine".