1320998267 has 4 divisors (see below), whose sum is σ = 1321663080. Its totient is φ = 1320333456.

The previous prime is 1320998221. The next prime is 1320998269. The reversal of 1320998267 is 7628990231.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7628990231 = 8539 ⋅893429.

It is a cyclic number.

It is not a de Polignac number, because 1320998267 - 2¹⁰ = 1320997243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1320998269) 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, 329417 + ... + 333402.

It is an arithmetic number, because the mean of its divisors is an integer number (330415770).

Almost surely, 2^1320998267 is an apocalyptic number.

1320998267 is a deficient number, since it is larger than the sum of its proper divisors (664813).

1320998267 is an equidigital number, since it uses as much as digits as its factorization.

1320998267 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 664812.

The product of its (nonzero) digits is 326592, while the sum is 47.

The square root of 1320998267 is about 36345.5398501659. The cubic root of 1320998267 is about 1097.2377711788.

The spelling of 1320998267 in words is "one billion, three hundred twenty million, nine hundred ninety-eight thousand, two hundred sixty-seven".