1161364899 has 4 divisors (see below), whose sum is σ = 1548486536. Its totient is φ = 774243264.

The previous prime is 1161364891. The next prime is 1161364901. The reversal of 1161364899 is 9984631611.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9984631611 = 3 ⋅3328210537.

It is not a de Polignac number, because 1161364899 - 2³ = 1161364891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1161364891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 193560814 + ... + 193560819.

It is an arithmetic number, because the mean of its divisors is an integer number (387121634).

Almost surely, 2^1161364899 is an apocalyptic number.

1161364899 is a deficient number, since it is larger than the sum of its proper divisors (387121637).

1161364899 is an equidigital number, since it uses as much as digits as its factorization.

1161364899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387121636.

The product of its digits is 279936, while the sum is 48.

The square root of 1161364899 is about 34078.8042483888. The cubic root of 1161364899 is about 1051.1295173874.

The spelling of 1161364899 in words is "one billion, one hundred sixty-one million, three hundred sixty-four thousand, eight hundred ninety-nine".