51067789 has 4 divisors (see below), whose sum is σ = 52255456. Its totient is φ = 49880124.

The previous prime is 51067787. The next prime is 51067799. The reversal of 51067789 is 98776015.

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.

It is a cyclic number.

It is not a de Polignac number, because 51067789 - 2¹ = 51067787 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43), and also a Moran number because the ratio is a prime number: 1187623 = 51067789 / (5 + 1 + 0 + 6 + 7 + 7 + 8 + 9).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51067781) 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, 593769 + ... + 593854.

It is an arithmetic number, because the mean of its divisors is an integer number (13063864).

Almost surely, 2^51067789 is an apocalyptic number.

It is an amenable number.

51067789 is a deficient number, since it is larger than the sum of its proper divisors (1187667).

51067789 is a wasteful number, since it uses less digits than its factorization.

51067789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1187666.

The product of its (nonzero) digits is 105840, while the sum is 43.

The square root of 51067789 is about 7146.1730317702. The cubic root of 51067789 is about 371.0072118582.

The spelling of 51067789 in words is "fifty-one million, sixty-seven thousand, seven hundred eighty-nine".