1661313134 has 16 divisors (see below), whose sum is σ = 2841522768. Its totient is φ = 721656192.

The previous prime is 1661313133. The next prime is 1661313179. The reversal of 1661313134 is 4313131661.

It is a super-2 number, since 2×1661313134² = 5519922658401803912, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1661313097 and 1661313106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1661313131) 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 7 ways as a sum of consecutive naturals, for example, 1878872 + ... + 1879755.

It is an arithmetic number, because the mean of its divisors is an integer number (177595173).

Almost surely, 2^1661313134 is an apocalyptic number.

1661313134 is a deficient number, since it is larger than the sum of its proper divisors (1180209634).

1661313134 is a wasteful number, since it uses less digits than its factorization.

1661313134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3758659.

The product of its digits is 3888, while the sum is 29.

The square root of 1661313134 is about 40759.2091925248. The cubic root of 1661313134 is about 1184.3602768771.

Adding to 1661313134 its reverse (4313131661), we get a palindrome (5974444795).

The spelling of 1661313134 in words is "one billion, six hundred sixty-one million, three hundred thirteen thousand, one hundred thirty-four".