1613709197 has 4 divisors (see below), whose sum is σ = 1698641280. Its totient is φ = 1528777116.

The previous prime is 1613709151. The next prime is 1613709217. The reversal of 1613709197 is 7919073161.

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 1613709197 - 2²⁴ = 1596931981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1613709127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42466013 + ... + 42466050.

It is an arithmetic number, because the mean of its divisors is an integer number (424660320).

Almost surely, 2^1613709197 is an apocalyptic number.

It is an amenable number.

1613709197 is a deficient number, since it is larger than the sum of its proper divisors (84932083).

1613709197 is an equidigital number, since it uses as much as digits as its factorization.

1613709197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84932082.

The product of its (nonzero) digits is 71442, while the sum is 44.

The square root of 1613709197 is about 40170.9994523412. Note that the first 3 decimals coincide. The cubic root of 1613709197 is about 1172.9380943141.

Adding to 1613709197 its sum of digits (44), we get a square (1613709241 = 40171²).

The spelling of 1613709197 in words is "one billion, six hundred thirteen million, seven hundred nine thousand, one hundred ninety-seven".