1361832649 has 4 divisors (see below), whose sum is σ = 1366480836. Its totient is φ = 1357184464.

The previous prime is 1361832629. The next prime is 1361832653. The reversal of 1361832649 is 9462381631.

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

It can be written as a sum of positive squares in 2 ways, for example, as 692058249 + 669774400 = 26307^2 + 25880^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1361832649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1361832629) 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, 2323654 + ... + 2324239.

It is an arithmetic number, because the mean of its divisors is an integer number (341620209).

Almost surely, 2^1361832649 is an apocalyptic number.

It is an amenable number.

1361832649 is a deficient number, since it is larger than the sum of its proper divisors (4648187).

1361832649 is an equidigital number, since it uses as much as digits as its factorization.

1361832649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4648186.

The product of its digits is 186624, while the sum is 43.

The square root of 1361832649 is about 36903.0168007983. The cubic root of 1361832649 is about 1108.4290872529.

The spelling of 1361832649 in words is "one billion, three hundred sixty-one million, eight hundred thirty-two thousand, six hundred forty-nine".