997445206 has 4 divisors (see below), whose sum is σ = 1496167812. Its totient is φ = 498722602.

The previous prime is 997445191. The next prime is 997445263. The reversal of 997445206 is 602544799.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 602544799 = 31 ⋅19436929.

It is a congruent number.

It is an unprimeable number.

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, 249361300 + ... + 249361303.

It is an arithmetic number, because the mean of its divisors is an integer number (374041953).

Almost surely, 2^997445206 is an apocalyptic number.

997445206 is a deficient number, since it is larger than the sum of its proper divisors (498722606).

997445206 is a wasteful number, since it uses less digits than its factorization.

997445206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 498722605.

The product of its (nonzero) digits is 544320, while the sum is 46.

The square root of 997445206 is about 31582.3559285877. The cubic root of 997445206 is about 999.1476757498.

The spelling of 997445206 in words is "nine hundred ninety-seven million, four hundred forty-five thousand, two hundred six".