997453394 has 8 divisors (see below), whose sum is σ = 1709920128. Its totient is φ = 427480020.

The previous prime is 997453381. The next prime is 997453399. The reversal of 997453394 is 493354799.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (997453399) 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 3 ways as a sum of consecutive naturals, for example, 35623322 + ... + 35623349.

It is an arithmetic number, because the mean of its divisors is an integer number (213740016).

Almost surely, 2^997453394 is an apocalyptic number.

997453394 is a deficient number, since it is larger than the sum of its proper divisors (712466734).

997453394 is a wasteful number, since it uses less digits than its factorization.

997453394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71246680.

The product of its digits is 3674160, while the sum is 53.

The square root of 997453394 is about 31582.4855576631. The cubic root of 997453394 is about 999.1504097341.

The spelling of 997453394 in words is "nine hundred ninety-seven million, four hundred fifty-three thousand, three hundred ninety-four".