51893189 has 2 divisors, whose sum is σ = 51893190. Its totient is φ = 51893188.

The previous prime is 51893147. The next prime is 51893239. The reversal of 51893189 is 98139815.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45792289 + 6100900 = 6767^2 + 2470^2 .

It is a cyclic number.

It is not a de Polignac number, because 51893189 - 2¹² = 51889093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51893489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25946594 + 25946595.

It is an arithmetic number, because the mean of its divisors is an integer number (25946595).

Almost surely, 2^51893189 is an apocalyptic number.

It is an amenable number.

51893189 is a deficient number, since it is larger than the sum of its proper divisors (1).

51893189 is an equidigital number, since it uses as much as digits as its factorization.

51893189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 77760, while the sum is 44.

The square root of 51893189 is about 7203.6927335916. The cubic root of 51893189 is about 372.9953807285.

The spelling of 51893189 in words is "fifty-one million, eight hundred ninety-three thousand, one hundred eighty-nine".