684071045 has 8 divisors (see below), whose sum is σ = 938154624. Its totient is φ = 469077264.

The previous prime is 684071039. The next prime is 684071051. The reversal of 684071045 is 540170486.

It is an interprime number because it is at equal distance from previous prime (684071039) and next prime (684071051).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 684071045 - 2¹² = 684066949 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35), and also a Moran number because the ratio is a prime number: 19544887 = 684071045 / (6 + 8 + 4 + 0 + 7 + 1 + 0 + 4 + 5).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 684070996 and 684071014.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9772409 + ... + 9772478.

It is an arithmetic number, because the mean of its divisors is an integer number (117269328).

Almost surely, 2^684071045 is an apocalyptic number.

It is an amenable number.

684071045 is a deficient number, since it is larger than the sum of its proper divisors (254083579).

684071045 is a wasteful number, since it uses less digits than its factorization.

684071045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19544899.

The product of its (nonzero) digits is 26880, while the sum is 35.

The square root of 684071045 is about 26154.7518627113. The cubic root of 684071045 is about 881.1173157042.

The spelling of 684071045 in words is "six hundred eighty-four million, seventy-one thousand, forty-five".