1198885397 has 4 divisors (see below), whose sum is σ = 1199397696. Its totient is φ = 1198373100.

The previous prime is 1198885393. The next prime is 1198885403. The reversal of 1198885397 is 7935888911.

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 1198885397 - 2² = 1198885393 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1198885393) 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, 252623 + ... + 257324.

It is an arithmetic number, because the mean of its divisors is an integer number (299849424).

Almost surely, 2^1198885397 is an apocalyptic number.

It is an amenable number.

1198885397 is a deficient number, since it is larger than the sum of its proper divisors (512299).

1198885397 is an equidigital number, since it uses as much as digits as its factorization.

1198885397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 512298.

The product of its digits is 4354560, while the sum is 59.

The square root of 1198885397 is about 34624.9245053329. The cubic root of 1198885397 is about 1062.3294554781.

The spelling of 1198885397 in words is "one billion, one hundred ninety-eight million, eight hundred eighty-five thousand, three hundred ninety-seven".