684617494 has 16 divisors (see below), whose sum is σ = 1168992000. Its totient is φ = 297659560.

The previous prime is 684617473. The next prime is 684617501. The reversal of 684617494 is 494716486.

It is a super-2 number, since 2×684617494² = 937402226181680072, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 675994 + ... + 677005.

It is an arithmetic number, because the mean of its divisors is an integer number (73062000).

Almost surely, 2^684617494 is an apocalyptic number.

684617494 is a deficient number, since it is larger than the sum of its proper divisors (484374506).

684617494 is a wasteful number, since it uses less digits than its factorization.

684617494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1353035.

The product of its digits is 1161216, while the sum is 49.

The square root of 684617494 is about 26165.1962346931. The cubic root of 684617494 is about 881.3518710328.

The spelling of 684617494 in words is "six hundred eighty-four million, six hundred seventeen thousand, four hundred ninety-four".