1898479469 has 2 divisors, whose sum is σ = 1898479470. Its totient is φ = 1898479468.

The previous prime is 1898479459. The next prime is 1898479481. The reversal of 1898479469 is 9649748981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1811523844 + 86955625 = 42562^2 + 9325^2 .

It is a cyclic number.

It is not a de Polignac number, because 1898479469 - 2¹² = 1898475373 is a prime.

It is a super-2 number, since 2×1898479469² = 7208448588429043922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1898479459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 949239734 + 949239735.

It is an arithmetic number, because the mean of its divisors is an integer number (949239735).

Almost surely, 2^1898479469 is an apocalyptic number.

It is an amenable number.

1898479469 is a deficient number, since it is larger than the sum of its proper divisors (1).

1898479469 is an equidigital number, since it uses as much as digits as its factorization.

1898479469 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31352832, while the sum is 65.

The square root of 1898479469 is about 43571.5442576919. The cubic root of 1898479469 is about 1238.2318427841.

The spelling of 1898479469 in words is "one billion, eight hundred ninety-eight million, four hundred seventy-nine thousand, four hundred sixty-nine".