997627451 has 2 divisors, whose sum is σ = 997627452. Its totient is φ = 997627450.

The previous prime is 997627403. The next prime is 997627459. The reversal of 997627451 is 154726799.

It is a strong prime.

It is an emirp because it is prime and its reverse (154726799) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 997627451 - 2¹⁴ = 997611067 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 997627451.

It is not a weakly prime, because it can be changed into another prime (997627459) 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, 498813725 + 498813726.

It is an arithmetic number, because the mean of its divisors is an integer number (498813726).

Almost surely, 2^997627451 is an apocalyptic number.

997627451 is a deficient number, since it is larger than the sum of its proper divisors (1).

997627451 is an equidigital number, since it uses as much as digits as its factorization.

997627451 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 952560, while the sum is 50.

The square root of 997627451 is about 31585.2410312158. The cubic root of 997627451 is about 999.2085240644.

The spelling of 997627451 in words is "nine hundred ninety-seven million, six hundred twenty-seven thousand, four hundred fifty-one".