617355421 has 4 divisors (see below), whose sum is σ = 637270144. Its totient is φ = 597440700.

The previous prime is 617355419. The next prime is 617355449. The reversal of 617355421 is 124553716.

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 617355421 - 2¹ = 617355419 is a prime.

It is a super-2 number, since 2×617355421² = 762255431676174482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (617355521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9957315 + ... + 9957376.

It is an arithmetic number, because the mean of its divisors is an integer number (159317536).

Almost surely, 2^617355421 is an apocalyptic number.

It is an amenable number.

617355421 is a deficient number, since it is larger than the sum of its proper divisors (19914723).

617355421 is a wasteful number, since it uses less digits than its factorization.

617355421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19914722.

The product of its digits is 25200, while the sum is 34.

The square root of 617355421 is about 24846.6380220745. The cubic root of 617355421 is about 851.4877846706.

The spelling of 617355421 in words is "six hundred seventeen million, three hundred fifty-five thousand, four hundred twenty-one".