51893791 has 2 divisors, whose sum is σ = 51893792. Its totient is φ = 51893790.

The previous prime is 51893753. The next prime is 51893801. The reversal of 51893791 is 19739815.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51893791 - 2⁷ = 51893663 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51890791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25946895 + 25946896.

It is an arithmetic number, because the mean of its divisors is an integer number (25946896).

Almost surely, 2^51893791 is an apocalyptic number.

51893791 is a deficient number, since it is larger than the sum of its proper divisors (1).

51893791 is an equidigital number, since it uses as much as digits as its factorization.

51893791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 68040, while the sum is 43.

The square root of 51893791 is about 7203.7345175957. The cubic root of 51893791 is about 372.9968230652.

The spelling of 51893791 in words is "fifty-one million, eight hundred ninety-three thousand, seven hundred ninety-one".