1098431995 has 8 divisors (see below), whose sum is σ = 1319235984. Its totient is φ = 878000544.

The previous prime is 1098431989. The next prime is 1098432001. The reversal of 1098431995 is 5991348901.

It is an interprime number because it is at equal distance from previous prime (1098431989) and next prime (1098432001).

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

It is a cyclic number.

It is not a de Polignac number, because 1098431995 - 2⁵ = 1098431963 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86604 + ... + 98473.

It is an arithmetic number, because the mean of its divisors is an integer number (164904498).

Almost surely, 2^1098431995 is an apocalyptic number.

1098431995 is a deficient number, since it is larger than the sum of its proper divisors (220803989).

1098431995 is a wasteful number, since it uses less digits than its factorization.

1098431995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186269.

The product of its (nonzero) digits is 349920, while the sum is 49.

The square root of 1098431995 is about 33142.6009088001. The cubic root of 1098431995 is about 1031.7893911884.

The spelling of 1098431995 in words is "one billion, ninety-eight million, four hundred thirty-one thousand, nine hundred ninety-five".