1617211406 has 4 divisors (see below), whose sum is σ = 2425817112. Its totient is φ = 808605702.

The previous prime is 1617211403. The next prime is 1617211423. The reversal of 1617211406 is 6041127161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6041127161 = 193 ⋅31301177.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1617211403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 404302850 + ... + 404302853.

It is an arithmetic number, because the mean of its divisors is an integer number (606454278).

Almost surely, 2^1617211406 is an apocalyptic number.

1617211406 is a deficient number, since it is larger than the sum of its proper divisors (808605706).

1617211406 is an equidigital number, since it uses as much as digits as its factorization.

1617211406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 808605705.

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 1617211406 is about 40214.5670870644. The cubic root of 1617211406 is about 1173.7860178811.

Adding to 1617211406 its reverse (6041127161), we get a palindrome (7658338567).

The spelling of 1617211406 in words is "one billion, six hundred seventeen million, two hundred eleven thousand, four hundred six".