51026839 has 2 divisors, whose sum is σ = 51026840. Its totient is φ = 51026838.

The previous prime is 51026813. The next prime is 51026867. The reversal of 51026839 is 93862015.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51026839 - 2²³ = 42638231 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51027839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25513419 + 25513420.

It is an arithmetic number, because the mean of its divisors is an integer number (25513420).

Almost surely, 2^51026839 is an apocalyptic number.

51026839 is a deficient number, since it is larger than the sum of its proper divisors (1).

51026839 is an equidigital number, since it uses as much as digits as its factorization.

51026839 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 51026839 is about 7143.3072872445. The cubic root of 51026839 is about 370.9080181634.

The spelling of 51026839 in words is "fifty-one million, twenty-six thousand, eight hundred thirty-nine".