34878449 has 2 divisors, whose sum is σ = 34878450. Its totient is φ = 34878448.

The previous prime is 34878409. The next prime is 34878479. The reversal of 34878449 is 94487843.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25000000 + 9878449 = 5000^2 + 3143^2 .

It is an emirp because it is prime and its reverse (94487843) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 34878449 - 2¹² = 34874353 is a prime.

It is not a weakly prime, because it can be changed into another prime (34878409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17439224 + 17439225.

It is an arithmetic number, because the mean of its divisors is an integer number (17439225).

Almost surely, 2^34878449 is an apocalyptic number.

It is an amenable number.

34878449 is a deficient number, since it is larger than the sum of its proper divisors (1).

34878449 is an equidigital number, since it uses as much as digits as its factorization.

34878449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 774144, while the sum is 47.

The square root of 34878449 is about 5905.7979139148. The cubic root of 34878449 is about 326.7275238323.

The spelling of 34878449 in words is "thirty-four million, eight hundred seventy-eight thousand, four hundred forty-nine".