610128993 has 4 divisors (see below), whose sum is σ = 813505328. Its totient is φ = 406752660.

The previous prime is 610128991. The next prime is 610129019. The reversal of 610128993 is 399821016.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 610128993 - 2¹ = 610128991 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (610128991) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101688163 + ... + 101688168.

It is an arithmetic number, because the mean of its divisors is an integer number (203376332).

Almost surely, 2^610128993 is an apocalyptic number.

It is an amenable number.

610128993 is a deficient number, since it is larger than the sum of its proper divisors (203376335).

610128993 is a wasteful number, since it uses less digits than its factorization.

610128993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203376334.

The product of its (nonzero) digits is 23328, while the sum is 39.

The square root of 610128993 is about 24700.7893193720. The cubic root of 610128993 is about 848.1523849688.

The spelling of 610128993 in words is "six hundred ten million, one hundred twenty-eight thousand, nine hundred ninety-three".