997436403 has 8 divisors (see below), whose sum is σ = 1477683600. Its totient is φ = 664957584.

The previous prime is 997436399. The next prime is 997436431. The reversal of 997436403 is 304634799.

It is not a de Polignac number, because 997436403 - 2² = 997436399 is a prime.

It is not an unprimeable number, because it can be changed into a prime (997436443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18471018 + ... + 18471071.

It is an arithmetic number, because the mean of its divisors is an integer number (184710450).

Almost surely, 2^997436403 is an apocalyptic number.

997436403 is a deficient number, since it is larger than the sum of its proper divisors (480247197).

997436403 is a wasteful number, since it uses less digits than its factorization.

997436403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36942098 (or 36942092 counting only the distinct ones).

The product of its (nonzero) digits is 489888, while the sum is 45.

The square root of 997436403 is about 31582.2165624897. The cubic root of 997436403 is about 999.1447363994.

The spelling of 997436403 in words is "nine hundred ninety-seven million, four hundred thirty-six thousand, four hundred three".