1997571454 has 8 divisors (see below), whose sum is σ = 2997487008. Its totient is φ = 998409120.

The previous prime is 1997571313. The next prime is 1997571461. The reversal of 1997571454 is 4541757991.

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

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, 181627 + ... + 192310.

It is an arithmetic number, because the mean of its divisors is an integer number (374685876).

Almost surely, 2^1997571454 is an apocalyptic number.

1997571454 is a deficient number, since it is larger than the sum of its proper divisors (999915554).

1997571454 is a wasteful number, since it uses less digits than its factorization.

1997571454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376610.

The product of its digits is 1587600, while the sum is 52.

The square root of 1997571454 is about 44694.1993327993. The cubic root of 1997571454 is about 1259.4108806399.

The spelling of 1997571454 in words is "one billion, nine hundred ninety-seven million, five hundred seventy-one thousand, four hundred fifty-four".