1198431801 has 64 divisors (see below), whose sum is σ = 2088345600. Its totient is φ = 665013888.

The previous prime is 1198431797. The next prime is 1198431809. The reversal of 1198431801 is 1081348911.

It is not a de Polignac number, because 1198431801 - 2² = 1198431797 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1198431809) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1942045 + ... + 1942661.

It is an arithmetic number, because the mean of its divisors is an integer number (32630400).

Almost surely, 2^1198431801 is an apocalyptic number.

It is an amenable number.

1198431801 is a deficient number, since it is larger than the sum of its proper divisors (889913799).

1198431801 is a wasteful number, since it uses less digits than its factorization.

1198431801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 915 (or 909 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 36.

The square root of 1198431801 is about 34618.3737486324. The cubic root of 1198431801 is about 1062.1954618045.

The spelling of 1198431801 in words is "one billion, one hundred ninety-eight million, four hundred thirty-one thousand, eight hundred one".