997627903 has 2 divisors, whose sum is σ = 997627904. Its totient is φ = 997627902.

The previous prime is 997627871. The next prime is 997627909. The reversal of 997627903 is 309726799.

It is a strong prime.

It is an emirp because it is prime and its reverse (309726799) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 997627903 - 2⁵ = 997627871 is a prime.

It is a super-2 number, since 2×997627903² = 1990522865688354818, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (997627909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498813951 + 498813952.

It is an arithmetic number, because the mean of its divisors is an integer number (498813952).

Almost surely, 2^997627903 is an apocalyptic number.

997627903 is a deficient number, since it is larger than the sum of its proper divisors (1).

997627903 is an equidigital number, since it uses as much as digits as its factorization.

997627903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1285956, while the sum is 52.

The square root of 997627903 is about 31585.2481864557. The cubic root of 997627903 is about 999.2086749699.

The spelling of 997627903 in words is "nine hundred ninety-seven million, six hundred twenty-seven thousand, nine hundred three".