64628629 has 4 divisors (see below), whose sum is σ = 69600076. Its totient is φ = 59657184.

The previous prime is 64628623. The next prime is 64628647. The reversal of 64628629 is 92682646.

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

It can be written as a sum of positive squares in 2 ways, for example, as 6838225 + 57790404 = 2615^2 + 7602^2 .

It is a cyclic number.

It is not a de Polignac number, because 64628629 - 2³ = 64628621 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64628621) 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, 2485704 + ... + 2485729.

It is an arithmetic number, because the mean of its divisors is an integer number (17400019).

Almost surely, 2^64628629 is an apocalyptic number.

It is an amenable number.

64628629 is a deficient number, since it is larger than the sum of its proper divisors (4971447).

64628629 is a wasteful number, since it uses less digits than its factorization.

64628629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4971446.

The product of its digits is 248832, while the sum is 43.

The square root of 64628629 is about 8039.1933053012. The cubic root of 64628629 is about 401.3053790795.

The spelling of 64628629 in words is "sixty-four million, six hundred twenty-eight thousand, six hundred twenty-nine".