1896898609 has 2 divisors, whose sum is σ = 1896898610. Its totient is φ = 1896898608.

The previous prime is 1896898583. The next prime is 1896898631. The reversal of 1896898609 is 9068986981.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1312467984 + 584430625 = 36228^2 + 24175^2 .

It is a cyclic number.

It is not a de Polignac number, because 1896898609 - 2¹³ = 1896890417 is a prime.

It is a super-2 number, since 2×1896898609² = 7196448665652269762, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1896898669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 948449304 + 948449305.

It is an arithmetic number, because the mean of its divisors is an integer number (948449305).

Almost surely, 2^1896898609 is an apocalyptic number.

It is an amenable number.

1896898609 is a deficient number, since it is larger than the sum of its proper divisors (1).

1896898609 is an equidigital number, since it uses as much as digits as its factorization.

1896898609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13436928, while the sum is 64.

The square root of 1896898609 is about 43553.3995114044. The cubic root of 1896898609 is about 1237.8880562957. Note that the first 3 decimals are identical.

The spelling of 1896898609 in words is "one billion, eight hundred ninety-six million, eight hundred ninety-eight thousand, six hundred nine".