684677477 has 16 divisors (see below), whose sum is σ = 761261760. Its totient is φ = 610531200.

The previous prime is 684677473. The next prime is 684677527. The reversal of 684677477 is 774776486.

It is a cyclic number.

It is not a de Polignac number, because 684677477 - 2² = 684677473 is a prime.

It is a super-2 number, since 2×684677477² = 937566495022171058, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684677473) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 396977 + ... + 398697.

It is an arithmetic number, because the mean of its divisors is an integer number (47578860).

Almost surely, 2^684677477 is an apocalyptic number.

It is an amenable number.

684677477 is a deficient number, since it is larger than the sum of its proper divisors (76584283).

684677477 is a wasteful number, since it uses less digits than its factorization.

684677477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2404.

The product of its digits is 11063808, while the sum is 56.

The square root of 684677477 is about 26166.3424459744. The cubic root of 684677477 is about 881.3776102647.

Subtracting 684677477 from its reverse (774776486), we obtain a palindrome (90099009).

The spelling of 684677477 in words is "six hundred eighty-four million, six hundred seventy-seven thousand, four hundred seventy-seven".