684902033 has 2 divisors, whose sum is σ = 684902034. Its totient is φ = 684902032.

The previous prime is 684901937. The next prime is 684902041. The reversal of 684902033 is 330209486.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 659821969 + 25080064 = 25687^2 + 5008^2 .

It is a cyclic number.

It is not a de Polignac number, because 684902033 - 2¹⁶ = 684836497 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 684901984 and 684902002.

It is not a weakly prime, because it can be changed into another prime (684902333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342451016 + 342451017.

It is an arithmetic number, because the mean of its divisors is an integer number (342451017).

Almost surely, 2^684902033 is an apocalyptic number.

It is an amenable number.

684902033 is a deficient number, since it is larger than the sum of its proper divisors (1).

684902033 is an equidigital number, since it uses as much as digits as its factorization.

684902033 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 684902033 is about 26170.6330263523. The cubic root of 684902033 is about 881.4739558697.

The spelling of 684902033 in words is "six hundred eighty-four million, nine hundred two thousand, thirty-three".