1961065349 has 8 divisors (see below), whose sum is σ = 2000580120. Its totient is φ = 1921643776.

The previous prime is 1961065343. The next prime is 1961065367. The reversal of 1961065349 is 9435601691.

It can be written as a sum of positive squares in 4 ways, for example, as 590733025 + 1370332324 = 24305^2 + 37018^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1961065349 - 2⁴ = 1961065333 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 (1961065343) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20009 + ... + 65745.

It is an arithmetic number, because the mean of its divisors is an integer number (250072515).

Almost surely, 2^1961065349 is an apocalyptic number.

It is an amenable number.

1961065349 is a deficient number, since it is larger than the sum of its proper divisors (39514771).

1961065349 is an equidigital number, since it uses as much as digits as its factorization.

1961065349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46599.

The product of its (nonzero) digits is 174960, while the sum is 44.

The square root of 1961065349 is about 44283.9174983424. The cubic root of 1961065349 is about 1251.6916507415.

The spelling of 1961065349 in words is "one billion, nine hundred sixty-one million, sixty-five thousand, three hundred forty-nine".