997277903 has 2 divisors, whose sum is σ = 997277904. Its totient is φ = 997277902.

The previous prime is 997277867. The next prime is 997277927. The reversal of 997277903 is 309772799.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 997277903 - 2¹² = 997273807 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (997277993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498638951 + 498638952.

It is an arithmetic number, because the mean of its divisors is an integer number (498638952).

Almost surely, 2^997277903 is an apocalyptic number.

997277903 is a deficient number, since it is larger than the sum of its proper divisors (1).

997277903 is an equidigital number, since it uses as much as digits as its factorization.

997277903 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1500282, while the sum is 53.

The square root of 997277903 is about 31579.7071392374. The cubic root of 997277903 is about 999.0918097735.

The spelling of 997277903 in words is "nine hundred ninety-seven million, two hundred seventy-seven thousand, nine hundred three".