997651351 has 2 divisors, whose sum is σ = 997651352. Its totient is φ = 997651350.

The previous prime is 997651339. The next prime is 997651357. The reversal of 997651351 is 153156799.

It is a strong prime.

It is an emirp because it is prime and its reverse (153156799) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 997651351 - 2⁷ = 997651223 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (997651357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498825675 + 498825676.

It is an arithmetic number, because the mean of its divisors is an integer number (498825676).

Almost surely, 2^997651351 is an apocalyptic number.

997651351 is a deficient number, since it is larger than the sum of its proper divisors (1).

997651351 is an equidigital number, since it uses as much as digits as its factorization.

997651351 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 255150, while the sum is 46.

The square root of 997651351 is about 31585.6193702134. The cubic root of 997651351 is about 999.2165032932.

The spelling of 997651351 in words is "nine hundred ninety-seven million, six hundred fifty-one thousand, three hundred fifty-one".