1613117791 has 4 divisors (see below), whose sum is σ = 1631242800. Its totient is φ = 1594992784.

The previous prime is 1613117773. The next prime is 1613117797. The reversal of 1613117791 is 1977113161.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1613117791 - 2¹³ = 1613109599 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1613117791.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1613117797) 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, 9062371 + ... + 9062548.

It is an arithmetic number, because the mean of its divisors is an integer number (407810700).

Almost surely, 2^1613117791 is an apocalyptic number.

1613117791 is a deficient number, since it is larger than the sum of its proper divisors (18125009).

1613117791 is an equidigital number, since it uses as much as digits as its factorization.

1613117791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18125008.

The product of its digits is 7938, while the sum is 37.

The square root of 1613117791 is about 40163.6376714062. The cubic root of 1613117791 is about 1172.7947873317.

The spelling of 1613117791 in words is "one billion, six hundred thirteen million, one hundred seventeen thousand, seven hundred ninety-one".