676148639 has 4 divisors (see below), whose sum is σ = 676606056. Its totient is φ = 675691224.

The previous prime is 676148621. The next prime is 676148677. The reversal of 676148639 is 936841676.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-676148639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (676148609) 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, 226484 + ... + 229449.

It is an arithmetic number, because the mean of its divisors is an integer number (169151514).

Almost surely, 2^676148639 is an apocalyptic number.

676148639 is a deficient number, since it is larger than the sum of its proper divisors (457417).

676148639 is a wasteful number, since it uses less digits than its factorization.

676148639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 457416.

The product of its digits is 1306368, while the sum is 50.

The square root of 676148639 is about 26002.8582851963. The cubic root of 676148639 is about 877.7026159070.

The spelling of 676148639 in words is "six hundred seventy-six million, one hundred forty-eight thousand, six hundred thirty-nine".