1441979857 has 4 divisors (see below), whose sum is σ = 1455209140. Its totient is φ = 1428750576.

The previous prime is 1441979843. The next prime is 1441979867. The reversal of 1441979857 is 7589791441.

It is a happy number.

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 432265681 + 1009714176 = 20791^2 + 31776^2 .

It is a cyclic number.

It is not a de Polignac number, because 1441979857 - 2¹¹ = 1441977809 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1441979798 and 1441979807.

It is not an unprimeable number, because it can be changed into a prime (1441979837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6614478 + ... + 6614695.

It is an arithmetic number, because the mean of its divisors is an integer number (363802285).

Almost surely, 2^1441979857 is an apocalyptic number.

It is an amenable number.

1441979857 is a deficient number, since it is larger than the sum of its proper divisors (13229283).

1441979857 is a wasteful number, since it uses less digits than its factorization.

1441979857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13229282.

The product of its digits is 2540160, while the sum is 55.

The square root of 1441979857 is about 37973.4098679589. The cubic root of 1441979857 is about 1129.7605300888.

The spelling of 1441979857 in words is "one billion, four hundred forty-one million, nine hundred seventy-nine thousand, eight hundred fifty-seven".