1043491231 has 2 divisors, whose sum is σ = 1043491232. Its totient is φ = 1043491230.

The previous prime is 1043491213. The next prime is 1043491261. The reversal of 1043491231 is 1321943401.

Together with previous prime (1043491213) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1043491231 - 2⁷ = 1043491103 is a prime.

It is a super-2 number, since 2×1043491231² = 2177747898347790722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1043491231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1043491201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 521745615 + 521745616.

It is an arithmetic number, because the mean of its divisors is an integer number (521745616).

Almost surely, 2^1043491231 is an apocalyptic number.

1043491231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1043491231 is an equidigital number, since it uses as much as digits as its factorization.

1043491231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 1043491231 is about 32303.1148807665. The cubic root of 1043491231 is about 1014.2918470388.

The spelling of 1043491231 in words is "one billion, forty-three million, four hundred ninety-one thousand, two hundred thirty-one".