38478313 has 2 divisors, whose sum is σ = 38478314. Its totient is φ = 38478312.

The previous prime is 38478299. The next prime is 38478343. The reversal of 38478313 is 31387483.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35426304 + 3052009 = 5952^2 + 1747^2 .

It is a cyclic number.

It is not a de Polignac number, because 38478313 - 2⁹ = 38477801 is a prime.

It is not a weakly prime, because it can be changed into another prime (38478343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19239156 + 19239157.

It is an arithmetic number, because the mean of its divisors is an integer number (19239157).

Almost surely, 2^38478313 is an apocalyptic number.

It is an amenable number.

38478313 is a deficient number, since it is larger than the sum of its proper divisors (1).

38478313 is an equidigital number, since it uses as much as digits as its factorization.

38478313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48384, while the sum is 37.

The square root of 38478313 is about 6203.0889885605. The cubic root of 38478313 is about 337.6022567149.

The spelling of 38478313 in words is "thirty-eight million, four hundred seventy-eight thousand, three hundred thirteen".