997000051 has 2 divisors, whose sum is σ = 997000052. Its totient is φ = 997000050.

The previous prime is 997000007. The next prime is 997000063. The reversal of 997000051 is 150000799.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 997000051 - 2⁷ = 996999923 is a prime.

It is equal to p_50702782 and since 997000051 and 50702782 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 996999977 and 997000022.

It is not a weakly prime, because it can be changed into another prime (997007051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498500025 + 498500026.

It is an arithmetic number, because the mean of its divisors is an integer number (498500026).

Almost surely, 2^997000051 is an apocalyptic number.

997000051 is a deficient number, since it is larger than the sum of its proper divisors (1).

997000051 is an equidigital number, since it uses as much as digits as its factorization.

997000051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2835, while the sum is 31.

The square root of 997000051 is about 31575.3076152870. The cubic root of 997000051 is about 998.9990153641. Note that the first 3 decimals are identical.

The spelling of 997000051 in words is "nine hundred ninety-seven million, fifty-one", and thus it is an aban number.