1000994591 has 2 divisors, whose sum is σ = 1000994592. Its totient is φ = 1000994590.

The previous prime is 1000994587. The next prime is 1000994593. The reversal of 1000994591 is 1954990001.

It is a strong prime.

It is an emirp because it is prime and its reverse (1954990001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1000994591 - 2² = 1000994587 is a prime.

It is a super-2 number, since 2×1000994591² = 2003980342422514562, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 1000994593, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1000994593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500497295 + 500497296.

It is an arithmetic number, because the mean of its divisors is an integer number (500497296).

Almost surely, 2^1000994591 is an apocalyptic number.

1000994591 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000994591 is an equidigital number, since it uses as much as digits as its factorization.

1000994591 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14580, while the sum is 38.

The square root of 1000994591 is about 31638.4985579278. The cubic root of 1000994591 is about 1000.3314204817.

The spelling of 1000994591 in words is "one billion, nine hundred ninety-four thousand, five hundred ninety-one".