1197161863 has 4 divisors (see below), whose sum is σ = 1222633440. Its totient is φ = 1171690288.

The previous prime is 1197161857. The next prime is 1197161869. The reversal of 1197161863 is 3681617911.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1197161857) and next prime (1197161869).

It is a cyclic number.

It is not a de Polignac number, because 1197161863 - 2²¹ = 1195064711 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 (1197161869) 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, 12735718 + ... + 12735811.

It is an arithmetic number, because the mean of its divisors is an integer number (305658360).

Almost surely, 2^1197161863 is an apocalyptic number.

1197161863 is a deficient number, since it is larger than the sum of its proper divisors (25471577).

1197161863 is an equidigital number, since it uses as much as digits as its factorization.

1197161863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25471576.

The product of its digits is 54432, while the sum is 43.

The square root of 1197161863 is about 34600.0269219548. The cubic root of 1197161863 is about 1061.8201382277.

The spelling of 1197161863 in words is "one billion, one hundred ninety-seven million, one hundred sixty-one thousand, eight hundred sixty-three".