617203421 has 2 divisors, whose sum is σ = 617203422. Its totient is φ = 617203420.

The previous prime is 617203417. The next prime is 617203441. The reversal of 617203421 is 124302716.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 544288900 + 72914521 = 23330^2 + 8539^2 .

It is a cyclic number.

It is not a de Polignac number, because 617203421 - 2² = 617203417 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (617203441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 308601710 + 308601711.

It is an arithmetic number, because the mean of its divisors is an integer number (308601711).

Almost surely, 2^617203421 is an apocalyptic number.

It is an amenable number.

617203421 is a deficient number, since it is larger than the sum of its proper divisors (1).

617203421 is an equidigital number, since it uses as much as digits as its factorization.

617203421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 617203421 is about 24843.5790698522. The cubic root of 617203421 is about 851.4178969083.

The spelling of 617203421 in words is "six hundred seventeen million, two hundred three thousand, four hundred twenty-one".