997549051 has 2 divisors, whose sum is σ = 997549052. Its totient is φ = 997549050.

The previous prime is 997549027. The next prime is 997549057. The reversal of 997549051 is 150945799.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 997549051 - 2⁵ = 997549019 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 997548986 and 997549004.

It is not a weakly prime, because it can be changed into another prime (997549057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498774525 + 498774526.

It is an arithmetic number, because the mean of its divisors is an integer number (498774526).

Almost surely, 2^997549051 is an apocalyptic number.

997549051 is a deficient number, since it is larger than the sum of its proper divisors (1).

997549051 is an equidigital number, since it uses as much as digits as its factorization.

997549051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 510300, while the sum is 49.

The square root of 997549051 is about 31583.9999208460. Note that the first 4 decimals coincide. The cubic root of 997549051 is about 999.1823486284.

The spelling of 997549051 in words is "nine hundred ninety-seven million, five hundred forty-nine thousand, fifty-one".