997251529 has 2 divisors, whose sum is σ = 997251530. Its totient is φ = 997251528.

The previous prime is 997251527. The next prime is 997251539. The reversal of 997251529 is 925152799.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 959760400 + 37491129 = 30980^2 + 6123^2 .

It is a cyclic number.

It is not a de Polignac number, because 997251529 - 2¹ = 997251527 is a prime.

It is a super-2 number, since 2×997251529² = 1989021224185675682, which contains 22 as substring.

Together with 997251527, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (997251527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498625764 + 498625765.

It is an arithmetic number, because the mean of its divisors is an integer number (498625765).

Almost surely, 2^997251529 is an apocalyptic number.

It is an amenable number.

997251529 is a deficient number, since it is larger than the sum of its proper divisors (1).

997251529 is an equidigital number, since it uses as much as digits as its factorization.

997251529 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 510300, while the sum is 49.

The square root of 997251529 is about 31579.2895581899. The cubic root of 997251529 is about 999.0830023724.

The spelling of 997251529 in words is "nine hundred ninety-seven million, two hundred fifty-one thousand, five hundred twenty-nine".