51290999 has 2 divisors, whose sum is σ = 51291000. Its totient is φ = 51290998.

The previous prime is 51290969. The next prime is 51291007. The reversal of 51290999 is 99909215.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51290999 is a prime.

It is a super-3 number, since 3×51290999³ (a number of 24 digits) contains 333 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51290969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25645499 + 25645500.

It is an arithmetic number, because the mean of its divisors is an integer number (25645500).

Almost surely, 2^51290999 is an apocalyptic number.

51290999 is a deficient number, since it is larger than the sum of its proper divisors (1).

51290999 is an equidigital number, since it uses as much as digits as its factorization.

51290999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 65610, while the sum is 44.

The square root of 51290999 is about 7161.7734535519. The cubic root of 51290999 is about 371.5469660399.

The spelling of 51290999 in words is "fifty-one million, two hundred ninety thousand, nine hundred ninety-nine".