1098631906 has 8 divisors (see below), whose sum is σ = 1649914560. Its totient is φ = 548660388.

The previous prime is 1098631903. The next prime is 1098631913. The reversal of 1098631906 is 6091368901.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1098631901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 325686 + ... + 329041.

It is an arithmetic number, because the mean of its divisors is an integer number (206239320).

Almost surely, 2^1098631906 is an apocalyptic number.

1098631906 is a deficient number, since it is larger than the sum of its proper divisors (551282654).

1098631906 is an equidigital number, since it uses as much as digits as its factorization.

1098631906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 655568.

The product of its (nonzero) digits is 69984, while the sum is 43.

The square root of 1098631906 is about 33145.6166936143. The cubic root of 1098631906 is about 1031.8519814801.

The spelling of 1098631906 in words is "one billion, ninety-eight million, six hundred thirty-one thousand, nine hundred six".