1049392891 has 2 divisors, whose sum is σ = 1049392892. Its totient is φ = 1049392890.

The previous prime is 1049392823. The next prime is 1049392907. The reversal of 1049392891 is 1982939401.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (1982939401) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1049392891 - 2¹⁷ = 1049261819 is a prime.

It is a super-2 number, since 2×1049392891² = 2202450879362675762, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1049392291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 524696445 + 524696446.

It is an arithmetic number, because the mean of its divisors is an integer number (524696446).

Almost surely, 2^1049392891 is an apocalyptic number.

1049392891 is the 17316-th centered heptagonal number.

1049392891 is a deficient number, since it is larger than the sum of its proper divisors (1).

1049392891 is an equidigital number, since it uses as much as digits as its factorization.

1049392891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 139968, while the sum is 46.

The square root of 1049392891 is about 32394.3342422714. The cubic root of 1049392891 is about 1016.2004259125.

The spelling of 1049392891 in words is "one billion, forty-nine million, three hundred ninety-two thousand, eight hundred ninety-one".