605996991 has 16 divisors (see below), whose sum is σ = 916876800. Its totient is φ = 395401464.

The previous prime is 605996987. The next prime is 605997023. The reversal of 605996991 is 199699506.

It is not a de Polignac number, because 605996991 - 2² = 605996987 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (605996981) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 237501 + ... + 240038.

It is an arithmetic number, because the mean of its divisors is an integer number (57304800).

Almost surely, 2^605996991 is an apocalyptic number.

605996991 is a deficient number, since it is larger than the sum of its proper divisors (310879809).

605996991 is a wasteful number, since it uses less digits than its factorization.

605996991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 477595 (or 477589 counting only the distinct ones).

The product of its (nonzero) digits is 1180980, while the sum is 54.

The square root of 605996991 is about 24617.0061339717. The cubic root of 605996991 is about 846.2333871459.

The spelling of 605996991 in words is "six hundred five million, nine hundred ninety-six thousand, nine hundred ninety-one".