1897454481 has 16 divisors (see below), whose sum is σ = 2762928000. Its totient is φ = 1151216640.

The previous prime is 1897454459. The next prime is 1897454497. The reversal of 1897454481 is 1844547981.

It is not a de Polignac number, because 1897454481 - 2¹³ = 1897446289 is a prime.

It is a super-2 number, since 2×1897454481² = 7200667014933958722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1897454401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 339856 + ... + 345393.

It is an arithmetic number, because the mean of its divisors is an integer number (172683000).

Almost surely, 2^1897454481 is an apocalyptic number.

It is an amenable number.

1897454481 is a deficient number, since it is larger than the sum of its proper divisors (865473519).

1897454481 is a wasteful number, since it uses less digits than its factorization.

1897454481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 685336.

The product of its digits is 1290240, while the sum is 51.

The square root of 1897454481 is about 43559.7805435243. The cubic root of 1897454481 is about 1238.0089624426.

The spelling of 1897454481 in words is "one billion, eight hundred ninety-seven million, four hundred fifty-four thousand, four hundred eighty-one".