606721697 has 4 divisors (see below), whose sum is σ = 610444080. Its totient is φ = 602999316.

The previous prime is 606721681. The next prime is 606721723. The reversal of 606721697 is 796127606.

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 a cyclic number.

It is not a de Polignac number, because 606721697 - 2⁴ = 606721681 is a prime.

It is a super-2 number, since 2×606721697² = 736222435221119618, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (606721667) 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, 1860947 + ... + 1861272.

It is an arithmetic number, because the mean of its divisors is an integer number (152611020).

Almost surely, 2^606721697 is an apocalyptic number.

It is an amenable number.

606721697 is a deficient number, since it is larger than the sum of its proper divisors (3722383).

606721697 is a wasteful number, since it uses less digits than its factorization.

606721697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3722382.

The product of its (nonzero) digits is 190512, while the sum is 44.

The square root of 606721697 is about 24631.7213568195. The cubic root of 606721697 is about 846.5705868990.

The spelling of 606721697 in words is "six hundred six million, seven hundred twenty-one thousand, six hundred ninety-seven".