1997434854 has 12 divisors (see below), whose sum is σ = 4327775556. Its totient is φ = 665811612.

The previous prime is 1997434849. The next prime is 1997434871. The reversal of 1997434854 is 4584347991.

1997434854 is a `hidden beast` number, since 1 + 99 + 74 + 3 + 485 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 1997434854.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 55484284 + ... + 55484319.

It is an arithmetic number, because the mean of its divisors is an integer number (360647963).

Almost surely, 2^1997434854 is an apocalyptic number.

1997434854 is an abundant number, since it is smaller than the sum of its proper divisors (2330340702).

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

1997434854 is a wasteful number, since it uses less digits than its factorization.

1997434854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110968611 (or 110968608 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 54.

The square root of 1997434854 is about 44692.6711441596. The cubic root of 1997434854 is about 1259.3821725391.

The spelling of 1997434854 in words is "one billion, nine hundred ninety-seven million, four hundred thirty-four thousand, eight hundred fifty-four".