1299664441 has 4 divisors (see below), whose sum is σ = 1300698000. Its totient is φ = 1298630884.

The previous prime is 1299664411. The next prime is 1299664451. The reversal of 1299664441 is 1444669921.

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 1299664441 - 2⁵ = 1299664409 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1299664391 and 1299664400.

It is not an unprimeable number, because it can be changed into a prime (1299664411) 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, 514891 + ... + 517408.

It is an arithmetic number, because the mean of its divisors is an integer number (325174500).

Almost surely, 2^1299664441 is an apocalyptic number.

It is an amenable number.

1299664441 is a deficient number, since it is larger than the sum of its proper divisors (1033559).

1299664441 is a wasteful number, since it uses less digits than its factorization.

1299664441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1033558.

The product of its digits is 373248, while the sum is 46.

The square root of 1299664441 is about 36050.8590882381. The cubic root of 1299664441 is about 1091.2989706972.

The spelling of 1299664441 in words is "one billion, two hundred ninety-nine million, six hundred sixty-four thousand, four hundred forty-one".