609780591 has 12 divisors (see below), whose sum is σ = 1006622032. Its totient is φ = 348446016.

The previous prime is 609780581. The next prime is 609780617. The reversal of 609780591 is 195087906.

It is not a de Polignac number, because 609780591 - 2⁹ = 609780079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (609780541) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4839466 + ... + 4839591.

Almost surely, 2^609780591 is an apocalyptic number.

609780591 is a deficient number, since it is larger than the sum of its proper divisors (396841441).

609780591 is a wasteful number, since it uses less digits than its factorization.

609780591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9679070 (or 9679067 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 45.

The square root of 609780591 is about 24693.7358655996. The cubic root of 609780591 is about 847.9909140588.

The spelling of 609780591 in words is "six hundred nine million, seven hundred eighty thousand, five hundred ninety-one".