653459890 has 8 divisors (see below), whose sum is σ = 1176227820. Its totient is φ = 261383952.

The previous prime is 653459867. The next prime is 653459909. The reversal of 653459890 is 98954356.

It can be written as a sum of positive squares in 2 ways, for example, as 616578561 + 36881329 = 24831^2 + 6073^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32672985 + ... + 32673004.

Almost surely, 2^653459890 is an apocalyptic number.

653459890 is a deficient number, since it is larger than the sum of its proper divisors (522767930).

653459890 is a wasteful number, since it uses less digits than its factorization.

653459890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65345996.

The product of its (nonzero) digits is 1166400, while the sum is 49.

The square root of 653459890 is about 25562.8615377856. The cubic root of 653459890 is about 867.7733565922.

The spelling of 653459890 in words is "six hundred fifty-three million, four hundred fifty-nine thousand, eight hundred ninety".