609091000 has 64 divisors (see below), whose sum is σ = 1628902080. Its totient is φ = 208828800.

The previous prime is 609090967. The next prime is 609091061. The reversal of 609091000 is 190906.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36507 + ... + 50506.

It is an arithmetic number, because the mean of its divisors is an integer number (25451595).

Almost surely, 2^609091000 is an apocalyptic number.

It is an amenable number.

609091000 is an abundant number, since it is smaller than the sum of its proper divisors (1019811080).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

609091000 is a wasteful number, since it uses less digits than its factorization.

609091000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87041 (or 87027 counting only the distinct ones).

The product of its (nonzero) digits is 486, while the sum is 25.

The square root of 609091000 is about 24679.7690426795. The cubic root of 609091000 is about 847.6711337508.

The spelling of 609091000 in words is "six hundred nine million, ninety-one thousand".