680632469 has 4 divisors (see below), whose sum is σ = 742508160. Its totient is φ = 618756780.

The previous prime is 680632411. The next prime is 680632471. The reversal of 680632469 is 964236086.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-680632469 is a prime.

It is a super-2 number, since 2×680632469² = 926521115714071922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (680632409) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 30937829 + ... + 30937850.

It is an arithmetic number, because the mean of its divisors is an integer number (185627040).

Almost surely, 2^680632469 is an apocalyptic number.

It is an amenable number.

680632469 is a deficient number, since it is larger than the sum of its proper divisors (61875691).

680632469 is a wasteful number, since it uses less digits than its factorization.

680632469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61875690.

The product of its (nonzero) digits is 373248, while the sum is 44.

The square root of 680632469 is about 26088.9338417652. The cubic root of 680632469 is about 879.6384831327.

The spelling of 680632469 in words is "six hundred eighty million, six hundred thirty-two thousand, four hundred sixty-nine".