609901964 has 24 divisors (see below), whose sum is σ = 1226201088. Its totient is φ = 260015760.

The previous prime is 609901961. The next prime is 609901991. The reversal of 609901964 is 469109906.

It is not an unprimeable number, because it can be changed into a prime (609901961) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51674 + ... + 62369.

It is an arithmetic number, because the mean of its divisors is an integer number (51091712).

Almost surely, 2^609901964 is an apocalyptic number.

It is an amenable number.

609901964 is an abundant number, since it is smaller than the sum of its proper divisors (616299124).

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

609901964 is a wasteful number, since it uses less digits than its factorization.

609901964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114245 (or 114243 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 44.

The square root of 609901964 is about 24696.1933099010. The cubic root of 609901964 is about 848.0471727496.

The spelling of 609901964 in words is "six hundred nine million, nine hundred one thousand, nine hundred sixty-four".