617396421 has 4 divisors (see below), whose sum is σ = 823195232. Its totient is φ = 411597612.

The previous prime is 617396411. The next prime is 617396441. The reversal of 617396421 is 124693716.

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 not a de Polignac number, because 617396421 - 2²⁵ = 583841989 is a prime.

It is a super-3 number, since 3×617396421³ (a number of 27 digits) contains 333 as substring.

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 617396421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (617396401) 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, 102899401 + ... + 102899406.

It is an arithmetic number, because the mean of its divisors is an integer number (205798808).

Almost surely, 2^617396421 is an apocalyptic number.

It is an amenable number.

617396421 is a deficient number, since it is larger than the sum of its proper divisors (205798811).

617396421 is a wasteful number, since it uses less digits than its factorization.

617396421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205798810.

The product of its digits is 54432, while the sum is 39.

The square root of 617396421 is about 24847.4630696979. The cubic root of 617396421 is about 851.5066340104.

The spelling of 617396421 in words is "six hundred seventeen million, three hundred ninety-six thousand, four hundred twenty-one".