1361991169 has 16 divisors (see below), whose sum is σ = 1752846336. Its totient is φ = 1027054800.

The previous prime is 1361991151. The next prime is 1361991199. The reversal of 1361991169 is 9611991631.

It is not a de Polignac number, because 1361991169 - 2¹¹ = 1361989121 is a prime.

It is a super-2 number, since 2×1361991169² = 3710039888867973122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1361991109) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 282907 + ... + 287680.

It is an arithmetic number, because the mean of its divisors is an integer number (109552896).

Almost surely, 2^1361991169 is an apocalyptic number.

It is an amenable number.

1361991169 is a deficient number, since it is larger than the sum of its proper divisors (390855167).

1361991169 is a wasteful number, since it uses less digits than its factorization.

1361991169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 570636.

The product of its digits is 78732, while the sum is 46.

The square root of 1361991169 is about 36905.1645301847. The cubic root of 1361991169 is about 1108.4720933599.

The spelling of 1361991169 in words is "one billion, three hundred sixty-one million, nine hundred ninety-one thousand, one hundred sixty-nine".