608420721 has 4 divisors (see below), whose sum is σ = 811227632. Its totient is φ = 405613812.

The previous prime is 608420713. The next prime is 608420741. The reversal of 608420721 is 127024806.

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 608420721 - 2³ = 608420713 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (608420741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101403451 + ... + 101403456.

It is an arithmetic number, because the mean of its divisors is an integer number (202806908).

Almost surely, 2^608420721 is an apocalyptic number.

It is an amenable number.

608420721 is a deficient number, since it is larger than the sum of its proper divisors (202806911).

608420721 is a wasteful number, since it uses less digits than its factorization.

608420721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202806910.

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 608420721 is about 24666.1857813485. The cubic root of 608420721 is about 847.3600774909.

The spelling of 608420721 in words is "six hundred eight million, four hundred twenty thousand, seven hundred twenty-one".