684490763 has 4 divisors (see below), whose sum is σ = 746717208. Its totient is φ = 622264320.

The previous prime is 684490759. The next prime is 684490769. The reversal of 684490763 is 367094486.

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

It is a cyclic number.

It is not a de Polignac number, because 684490763 - 2² = 684490759 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (684490769) 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, 31113206 + ... + 31113227.

It is an arithmetic number, because the mean of its divisors is an integer number (186679302).

Almost surely, 2^684490763 is an apocalyptic number.

684490763 is a deficient number, since it is larger than the sum of its proper divisors (62226445).

684490763 is a wasteful number, since it uses less digits than its factorization.

684490763 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62226444.

The product of its (nonzero) digits is 870912, while the sum is 47.

The square root of 684490763 is about 26162.7743750543. The cubic root of 684490763 is about 881.2974847039.

The spelling of 684490763 in words is "six hundred eighty-four million, four hundred ninety thousand, seven hundred sixty-three".