1049297891 has 2 divisors, whose sum is σ = 1049297892. Its totient is φ = 1049297890.

The previous prime is 1049297861. The next prime is 1049297897. The reversal of 1049297891 is 1987929401.

It is a strong prime.

It is an emirp because it is prime and its reverse (1987929401) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1049297891 - 2¹⁴ = 1049281507 is a prime.

It is a super-2 number, since 2×1049297891² = 2202052128114095762, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1049297897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 524648945 + 524648946.

It is an arithmetic number, because the mean of its divisors is an integer number (524648946).

Almost surely, 2^1049297891 is an apocalyptic number.

1049297891 is a deficient number, since it is larger than the sum of its proper divisors (1).

1049297891 is an equidigital number, since it uses as much as digits as its factorization.

1049297891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 326592, while the sum is 50.

The square root of 1049297891 is about 32392.8679032901. The cubic root of 1049297891 is about 1016.1697599421.

The spelling of 1049297891 in words is "one billion, forty-nine million, two hundred ninety-seven thousand, eight hundred ninety-one".