684845141 has 4 divisors (see below), whose sum is σ = 685025484. Its totient is φ = 684664800.

The previous prime is 684845137. The next prime is 684845243. The reversal of 684845141 is 141548486.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 581822641 + 103022500 = 24121^2 + 10150^2 .

It is a cyclic number.

It is not a de Polignac number, because 684845141 - 2² = 684845137 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684845111) 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, 84350 + ... + 92111.

It is an arithmetic number, because the mean of its divisors is an integer number (171256371).

Almost surely, 2^684845141 is an apocalyptic number.

It is an amenable number.

684845141 is a deficient number, since it is larger than the sum of its proper divisors (180343).

684845141 is a wasteful number, since it uses less digits than its factorization.

684845141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180342.

The product of its digits is 122880, while the sum is 41.

The square root of 684845141 is about 26169.5460602587. The cubic root of 684845141 is about 881.4495483864.

The spelling of 684845141 in words is "six hundred eighty-four million, eight hundred forty-five thousand, one hundred forty-one".