51784379 has 2 divisors, whose sum is σ = 51784380. Its totient is φ = 51784378.

The previous prime is 51784373. The next prime is 51784387. The reversal of 51784379 is 97348715.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51784379 - 2²⁴ = 35007163 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51784373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25892189 + 25892190.

It is an arithmetic number, because the mean of its divisors is an integer number (25892190).

Almost surely, 2^51784379 is an apocalyptic number.

51784379 is a deficient number, since it is larger than the sum of its proper divisors (1).

51784379 is an equidigital number, since it uses as much as digits as its factorization.

51784379 is an evil number, because the sum of its binary digits is even.

The product of its digits is 211680, while the sum is 44.

The square root of 51784379 is about 7196.1363939270. The cubic root of 51784379 is about 372.7344985331.

The spelling of 51784379 in words is "fifty-one million, seven hundred eighty-four thousand, three hundred seventy-nine".