997951049 has 2 divisors, whose sum is σ = 997951050. Its totient is φ = 997951048.

The previous prime is 997951027. The next prime is 997951061. The reversal of 997951049 is 940159799.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 835210000 + 162741049 = 28900^2 + 12757^2 .

It is a cyclic number.

It is not a de Polignac number, because 997951049 - 2¹⁶ = 997885513 is a prime.

It is not a weakly prime, because it can be changed into another prime (997951249) 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, 498975524 + 498975525.

It is an arithmetic number, because the mean of its divisors is an integer number (498975525).

Almost surely, 2^997951049 is an apocalyptic number.

It is an amenable number.

997951049 is a deficient number, since it is larger than the sum of its proper divisors (1).

997951049 is an equidigital number, since it uses as much as digits as its factorization.

997951049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 918540, while the sum is 53.

The square root of 997951049 is about 31590.3632299472. The cubic root of 997951049 is about 999.3165493349.

The spelling of 997951049 in words is "nine hundred ninety-seven million, nine hundred fifty-one thousand, forty-nine".