1198139813 has 8 divisors (see below), whose sum is σ = 1298222688. Its totient is φ = 1099188144.

The previous prime is 1198139749. The next prime is 1198139827. The reversal of 1198139813 is 3189318911.

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 1198139813 - 2⁶ = 1198139749 is a prime.

It is a super-2 number, since 2×1198139813² = 2871078022991349938, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1498139813) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 280595 + ... + 284832.

It is an arithmetic number, because the mean of its divisors is an integer number (162277836).

Almost surely, 2^1198139813 is an apocalyptic number.

1198139813 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1198139813 is a deficient number, since it is larger than the sum of its proper divisors (100082875).

1198139813 is a wasteful number, since it uses less digits than its factorization.

1198139813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 565603.

The product of its digits is 46656, while the sum is 44.

The square root of 1198139813 is about 34614.1562514530. The cubic root of 1198139813 is about 1062.1091897502.

The spelling of 1198139813 in words is "one billion, one hundred ninety-eight million, one hundred thirty-nine thousand, eight hundred thirteen".