34778473 has 2 divisors, whose sum is σ = 34778474. Its totient is φ = 34778472.

The previous prime is 34778467. The next prime is 34778489. The reversal of 34778473 is 37487743.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23299929 + 11478544 = 4827^2 + 3388^2 .

It is an emirp because it is prime and its reverse (37487743) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 34778473 - 2¹⁷ = 34647401 is a prime.

It is not a weakly prime, because it can be changed into another prime (34778173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17389236 + 17389237.

It is an arithmetic number, because the mean of its divisors is an integer number (17389237).

Almost surely, 2^34778473 is an apocalyptic number.

It is an amenable number.

34778473 is a deficient number, since it is larger than the sum of its proper divisors (1).

34778473 is an equidigital number, since it uses as much as digits as its factorization.

34778473 is an evil number, because the sum of its binary digits is even.

The product of its digits is 395136, while the sum is 43.

The square root of 34778473 is about 5897.3276151152. The cubic root of 34778473 is about 326.4150465288.

The spelling of 34778473 in words is "thirty-four million, seven hundred seventy-eight thousand, four hundred seventy-three".