609957890 has 8 divisors (see below), whose sum is σ = 1097924220. Its totient is φ = 243983152.

The previous prime is 609957847. The next prime is 609957923. The reversal of 609957890 is 98759906.

It can be written as a sum of positive squares in 2 ways, for example, as 603046249 + 6911641 = 24557^2 + 2629^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30497885 + ... + 30497904.

Almost surely, 2^609957890 is an apocalyptic number.

609957890 is a deficient number, since it is larger than the sum of its proper divisors (487966330).

609957890 is a wasteful number, since it uses less digits than its factorization.

609957890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60995796.

The product of its (nonzero) digits is 1224720, while the sum is 53.

The square root of 609957890 is about 24697.3255637124. The cubic root of 609957890 is about 848.0730930010.

The spelling of 609957890 in words is "six hundred nine million, nine hundred fifty-seven thousand, eight hundred ninety".