684421741 has 4 divisors (see below), whose sum is σ = 714179232. Its totient is φ = 654664252.

The previous prime is 684421711. The next prime is 684421747. The reversal of 684421741 is 147124486.

It is a happy number.

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 684421741 - 2⁷ = 684421613 is a prime.

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 684421741.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684421747) 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, 14878711 + ... + 14878756.

It is an arithmetic number, because the mean of its divisors is an integer number (178544808).

Almost surely, 2^684421741 is an apocalyptic number.

It is an amenable number.

684421741 is a deficient number, since it is larger than the sum of its proper divisors (29757491).

684421741 is a wasteful number, since it uses less digits than its factorization.

684421741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29757490.

The product of its digits is 43008, while the sum is 37.

The square root of 684421741 is about 26161.4552538654. The cubic root of 684421741 is about 881.2678612412.

The spelling of 684421741 in words is "six hundred eighty-four million, four hundred twenty-one thousand, seven hundred forty-one".