1019661441 has 4 divisors (see below), whose sum is σ = 1359548592. Its totient is φ = 679774292.

The previous prime is 1019661427. The next prime is 1019661449. The reversal of 1019661441 is 1441669101.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1019661441 - 2¹¹ = 1019659393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1019661449) 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, 169943571 + ... + 169943576.

It is an arithmetic number, because the mean of its divisors is an integer number (339887148).

Almost surely, 2^1019661441 is an apocalyptic number.

It is an amenable number.

1019661441 is a deficient number, since it is larger than the sum of its proper divisors (339887151).

1019661441 is an equidigital number, since it uses as much as digits as its factorization.

1019661441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339887150.

The product of its (nonzero) digits is 5184, while the sum is 33.

The square root of 1019661441 is about 31932.1380587019. The cubic root of 1019661441 is about 1006.5113243016.

The spelling of 1019661441 in words is "one billion, nineteen million, six hundred sixty-one thousand, four hundred forty-one".