50128997 has 2 divisors, whose sum is σ = 50128998. Its totient is φ = 50128996.

The previous prime is 50128993. The next prime is 50129021. The reversal of 50128997 is 79982105.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48804196 + 1324801 = 6986^2 + 1151^2 .

It is a cyclic number.

It is not a de Polignac number, because 50128997 - 2² = 50128993 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (50128993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25064498 + 25064499.

It is an arithmetic number, because the mean of its divisors is an integer number (25064499).

Almost surely, 2^50128997 is an apocalyptic number.

It is an amenable number.

50128997 is a deficient number, since it is larger than the sum of its proper divisors (1).

50128997 is an equidigital number, since it uses as much as digits as its factorization.

50128997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45360, while the sum is 41.

The square root of 50128997 is about 7080.1834015794. The cubic root of 50128997 is about 368.7196971364.

The spelling of 50128997 in words is "fifty million, one hundred twenty-eight thousand, nine hundred ninety-seven".