1609601697 has 12 divisors (see below), whose sum is σ = 2536342224. Its totient is φ = 975516120.

The previous prime is 1609601647. The next prime is 1609601711. The reversal of 1609601697 is 7961069061.

1609601697 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1609601697 - 2¹² = 1609597601 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1609601627) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8129203 + ... + 8129400.

It is an arithmetic number, because the mean of its divisors is an integer number (211361852).

Almost surely, 2^1609601697 is an apocalyptic number.

It is an amenable number.

1609601697 is a deficient number, since it is larger than the sum of its proper divisors (926740527).

1609601697 is a wasteful number, since it uses less digits than its factorization.

1609601697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16258620 (or 16258617 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 45.

The square root of 1609601697 is about 40119.8416871253. The cubic root of 1609601697 is about 1171.9420584389.

It can be divided in two parts, 1609 and 601697, that added together give a palindrome (603306).

The spelling of 1609601697 in words is "one billion, six hundred nine million, six hundred one thousand, six hundred ninety-seven".