997251803 has 12 divisors (see below), whose sum is σ = 1084713480. Its totient is φ = 914271840.

The previous prime is 997251769. The next prime is 997251811. The reversal of 997251803 is 308152799.

It is not a de Polignac number, because 997251803 - 2¹² = 997247707 is a prime.

It is a super-2 number, since 2×997251803² = 1989022317173501618, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (997251823) 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 in 11 ways as a sum of consecutive naturals, for example, 9050 + ... + 45567.

It is an arithmetic number, because the mean of its divisors is an integer number (90392790).

Almost surely, 2^997251803 is an apocalyptic number.

997251803 is a deficient number, since it is larger than the sum of its proper divisors (87461677).

997251803 is a wasteful number, since it uses less digits than its factorization.

997251803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54698 (or 54667 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 44.

The square root of 997251803 is about 31579.2938964759. The cubic root of 997251803 is about 999.0830938734.

The spelling of 997251803 in words is "nine hundred ninety-seven million, two hundred fifty-one thousand, eight hundred three".