1964881349 has 8 divisors (see below), whose sum is σ = 2012127480. Its totient is φ = 1918012096.

The previous prime is 1964881319. The next prime is 1964881357. The reversal of 1964881349 is 9431884691.

It can be written as a sum of positive squares in 4 ways, for example, as 665278849 + 1299602500 = 25793^2 + 36050^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1964881349 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1964881349.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1964881319) 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, 83654 + ... + 104535.

It is an arithmetic number, because the mean of its divisors is an integer number (251515935).

Almost surely, 2^1964881349 is an apocalyptic number.

It is an amenable number.

1964881349 is a deficient number, since it is larger than the sum of its proper divisors (47246131).

1964881349 is a wasteful number, since it uses less digits than its factorization.

1964881349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188439.

The product of its digits is 1492992, while the sum is 53.

The square root of 1964881349 is about 44326.9821779015. The cubic root of 1964881349 is about 1252.5030057444.

The spelling of 1964881349 in words is "one billion, nine hundred sixty-four million, eight hundred eighty-one thousand, three hundred forty-nine".