1010943491 has 4 divisors (see below), whose sum is σ = 1016591400. Its totient is φ = 1005295584.

The previous prime is 1010943433. The next prime is 1010943523. The reversal of 1010943491 is 1943490101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1943490101 = 7 ⋅277641443.

It is a cyclic number.

It is not a de Polignac number, because 1010943491 - 2¹⁰ = 1010942467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1010943421) 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, 2823686 + ... + 2824043.

It is an arithmetic number, because the mean of its divisors is an integer number (254147850).

Almost surely, 2^1010943491 is an apocalyptic number.

1010943491 is a deficient number, since it is larger than the sum of its proper divisors (5647909).

1010943491 is an equidigital number, since it uses as much as digits as its factorization.

1010943491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5647908.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 1010943491 is about 31795.3375670082. The cubic root of 1010943491 is about 1003.6346039824.

The spelling of 1010943491 in words is "one billion, ten million, nine hundred forty-three thousand, four hundred ninety-one".