656629487 has 4 divisors (see below), whose sum is σ = 656762880. Its totient is φ = 656496096.

The previous prime is 656629453. The next prime is 656629529. The reversal of 656629487 is 784926656.

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 656629487 - 2¹⁸ = 656367343 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 (656629387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59018 + ... + 69255.

It is an arithmetic number, because the mean of its divisors is an integer number (164190720).

Almost surely, 2^656629487 is an apocalyptic number.

656629487 is a deficient number, since it is larger than the sum of its proper divisors (133393).

656629487 is a wasteful number, since it uses less digits than its factorization.

656629487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133392.

The product of its digits is 4354560, while the sum is 53.

The square root of 656629487 is about 25624.7826722491. The cubic root of 656629487 is about 869.1741345854.

The spelling of 656629487 in words is "six hundred fifty-six million, six hundred twenty-nine thousand, four hundred eighty-seven".