1198917399 has 16 divisors (see below), whose sum is σ = 1629919584. Its totient is φ = 783619200.

The previous prime is 1198917373. The next prime is 1198917409. The reversal of 1198917399 is 9937198911.

It is not a de Polignac number, because 1198917399 - 2¹⁷ = 1198786327 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1198917329) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 370609 + ... + 373829.

It is an arithmetic number, because the mean of its divisors is an integer number (101869974).

Almost surely, 2^1198917399 is an apocalyptic number.

1198917399 is a deficient number, since it is larger than the sum of its proper divisors (431002185).

1198917399 is a wasteful number, since it uses less digits than its factorization.

1198917399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5618.

The product of its digits is 1102248, while the sum is 57.

The square root of 1198917399 is about 34625.3866260003. The cubic root of 1198917399 is about 1062.3389076924.

The spelling of 1198917399 in words is "one billion, one hundred ninety-eight million, nine hundred seventeen thousand, three hundred ninety-nine".