34378789 has 4 divisors (see below), whose sum is σ = 34505920. Its totient is φ = 34251660.

The previous prime is 34378763. The next prime is 34378823. The reversal of 34378789 is 98787343.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 98787343 = 6977 ⋅14159.

It is a cyclic number.

It is not a de Polignac number, because 34378789 - 2¹⁹ = 33854501 is a prime.

It is a super-2 number, since 2×34378789² = 2363802266213042, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (34378189) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63159 + ... + 63700.

It is an arithmetic number, because the mean of its divisors is an integer number (8626480).

Almost surely, 2^34378789 is an apocalyptic number.

It is an amenable number.

34378789 is a deficient number, since it is larger than the sum of its proper divisors (127131).

34378789 is a wasteful number, since it uses less digits than its factorization.

34378789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127130.

The product of its digits is 1016064, while the sum is 49.

The square root of 34378789 is about 5863.3428178813. The cubic root of 34378789 is about 325.1598077976.

The spelling of 34378789 in words is "thirty-four million, three hundred seventy-eight thousand, seven hundred eighty-nine".