1997534454 has 8 divisors (see below), whose sum is σ = 3995068920. Its totient is φ = 665844816.

The previous prime is 1997534431. The next prime is 1997534479. The reversal of 1997534454 is 4544357991.

It is a happy number.

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

1997534454 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 1997534397 and 1997534406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 166461199 + ... + 166461210.

It is an arithmetic number, because the mean of its divisors is an integer number (499383615).

Almost surely, 2^1997534454 is an apocalyptic number.

1997534454 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1997534454 is a wasteful number, since it uses less digits than its factorization.

1997534454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332922414.

The product of its digits is 2721600, while the sum is 51.

The square root of 1997534454 is about 44693.7854069221. The cubic root of 1997534454 is about 1259.4031047828.

The spelling of 1997534454 in words is "one billion, nine hundred ninety-seven million, five hundred thirty-four thousand, four hundred fifty-four".