1098671649 has 4 divisors (see below), whose sum is σ = 1464895536. Its totient is φ = 732447764.

The previous prime is 1098671647. The next prime is 1098671653. The reversal of 1098671649 is 9461768901.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1098671649 - 2¹ = 1098671647 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1098671647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 183111939 + ... + 183111944.

It is an arithmetic number, because the mean of its divisors is an integer number (366223884).

Almost surely, 2^1098671649 is an apocalyptic number.

It is an amenable number.

1098671649 is a deficient number, since it is larger than the sum of its proper divisors (366223887).

1098671649 is an equidigital number, since it uses as much as digits as its factorization.

1098671649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366223886.

The product of its (nonzero) digits is 653184, while the sum is 51.

The square root of 1098671649 is about 33146.2162093956. The cubic root of 1098671649 is about 1031.8644237423.

The spelling of 1098671649 in words is "one billion, ninety-eight million, six hundred seventy-one thousand, six hundred forty-nine".