1198745311 has 4 divisors (see below), whose sum is σ = 1198822824. Its totient is φ = 1198667800.

The previous prime is 1198745309. The next prime is 1198745329. The reversal of 1198745311 is 1135478911.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1198745311 - 2¹ = 1198745309 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 (1198745341) 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, 6745 + ... + 49426.

It is an arithmetic number, because the mean of its divisors is an integer number (299705706).

Almost surely, 2^1198745311 is an apocalyptic number.

1198745311 is a deficient number, since it is larger than the sum of its proper divisors (77513).

1198745311 is an equidigital number, since it uses as much as digits as its factorization.

1198745311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77512.

The product of its digits is 30240, while the sum is 40.

The square root of 1198745311 is about 34622.9015392991. The cubic root of 1198745311 is about 1062.2880772444.

The spelling of 1198745311 in words is "one billion, one hundred ninety-eight million, seven hundred forty-five thousand, three hundred eleven".