997956937 has 2 divisors, whose sum is σ = 997956938. Its totient is φ = 997956936.

The previous prime is 997956923. The next prime is 997956979. The reversal of 997956937 is 739659799.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 803382336 + 194574601 = 28344^2 + 13949^2 .

It is an emirp because it is prime and its reverse (739659799) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 997956937 - 2⁷ = 997956809 is a prime.

It is not a weakly prime, because it can be changed into another prime (997956907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498978468 + 498978469.

It is an arithmetic number, because the mean of its divisors is an integer number (498978469).

Almost surely, 2^997956937 is an apocalyptic number.

It is an amenable number.

997956937 is a deficient number, since it is larger than the sum of its proper divisors (1).

997956937 is an equidigital number, since it uses as much as digits as its factorization.

997956937 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28934010, while the sum is 64.

The square root of 997956937 is about 31590.4564227869. The cubic root of 997956937 is about 999.3185146833.

The spelling of 997956937 in words is "nine hundred ninety-seven million, nine hundred fifty-six thousand, nine hundred thirty-seven".