629145866 has 4 divisors (see below), whose sum is σ = 943718802. Its totient is φ = 314572932.

The previous prime is 629145859. The next prime is 629145871. The reversal of 629145866 is 668541926.

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

It can be written as a sum of positive squares in only one way, i.e., 490401025 + 138744841 = 22145^2 + 11779^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 629145866.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157286465 + ... + 157286468.

Almost surely, 2^629145866 is an apocalyptic number.

629145866 is a deficient number, since it is larger than the sum of its proper divisors (314572936).

629145866 is a wasteful number, since it uses less digits than its factorization.

629145866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314572935.

The product of its digits is 622080, while the sum is 47.

The square root of 629145866 is about 25082.7802685428. The cubic root of 629145866 is about 856.8742968660.

The spelling of 629145866 in words is "six hundred twenty-nine million, one hundred forty-five thousand, eight hundred sixty-six".