1897256674 has 4 divisors (see below), whose sum is σ = 2845885014. Its totient is φ = 948628336.

The previous prime is 1897256663. The next prime is 1897256681. The reversal of 1897256674 is 4766527981.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4766527981 = 23 ⋅207240347.

It can be written as a sum of positive squares in only one way, i.e., 1798353649 + 98903025 = 42407^2 + 9945^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 474314167 + ... + 474314170.

Almost surely, 2^1897256674 is an apocalyptic number.

1897256674 is a deficient number, since it is larger than the sum of its proper divisors (948628340).

1897256674 is an equidigital number, since it uses as much as digits as its factorization.

1897256674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 948628339.

The product of its digits is 5080320, while the sum is 55.

The square root of 1897256674 is about 43557.5099609700. The cubic root of 1897256674 is about 1237.9659407081.

The spelling of 1897256674 in words is "one billion, eight hundred ninety-seven million, two hundred fifty-six thousand, six hundred seventy-four".