51009967 has 2 divisors, whose sum is σ = 51009968. Its totient is φ = 51009966.

The previous prime is 51009961. The next prime is 51010019. The reversal of 51009967 is 76990015.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51009967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51009961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25504983 + 25504984.

It is an arithmetic number, because the mean of its divisors is an integer number (25504984).

Almost surely, 2^51009967 is an apocalyptic number.

51009967 is a deficient number, since it is larger than the sum of its proper divisors (1).

51009967 is an equidigital number, since it uses as much as digits as its factorization.

51009967 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17010, while the sum is 37.

The square root of 51009967 is about 7142.1262240316. The cubic root of 51009967 is about 370.8671334704.

The spelling of 51009967 in words is "fifty-one million, nine thousand, nine hundred sixty-seven".