1617792491 has 8 divisors (see below), whose sum is σ = 1863020544. Its totient is φ = 1376093160.

The previous prime is 1617792479. The next prime is 1617792503. The reversal of 1617792491 is 1942977161.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1617792479) and next prime (1617792503).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1617792491 - 2³⁰ = 544050667 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1617792401) 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 7 ways as a sum of consecutive naturals, for example, 881195 + ... + 883028.

It is an arithmetic number, because the mean of its divisors is an integer number (232877568).

Almost surely, 2^1617792491 is an apocalyptic number.

1617792491 is a deficient number, since it is larger than the sum of its proper divisors (245228053).

1617792491 is a wasteful number, since it uses less digits than its factorization.

1617792491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1764361.

The product of its digits is 190512, while the sum is 47.

The square root of 1617792491 is about 40221.7912455425. The cubic root of 1617792491 is about 1173.9265865517.

The spelling of 1617792491 in words is "one billion, six hundred seventeen million, seven hundred ninety-two thousand, four hundred ninety-one".