1897332442 has 4 divisors (see below), whose sum is σ = 2845998666. Its totient is φ = 948666220.

The previous prime is 1897332421. The next prime is 1897332449. The reversal of 1897332442 is 2442337981.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2442337981 = 59 ⋅41395559.

It can be written as a sum of positive squares in only one way, i.e., 1888858521 + 8473921 = 43461^2 + 2911^2 .

It is not an unprimeable number, because it can be changed into a prime (1897332449) 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 as a sum of consecutive naturals, namely, 474333109 + ... + 474333112.

Almost surely, 2^1897332442 is an apocalyptic number.

1897332442 is a deficient number, since it is larger than the sum of its proper divisors (948666224).

1897332442 is an equidigital number, since it uses as much as digits as its factorization.

1897332442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 948666223.

The product of its digits is 290304, while the sum is 43.

The square root of 1897332442 is about 43558.3796989741. The cubic root of 1897332442 is about 1237.9824201080.

It can be divided in two parts, 18973 and 32442, that added together give a palindrome (51415).

The spelling of 1897332442 in words is "one billion, eight hundred ninety-seven million, three hundred thirty-two thousand, four hundred forty-two".