629691945 has 8 divisors (see below), whose sum is σ = 1007507136. Its totient is φ = 335835696.

The previous prime is 629691913. The next prime is 629691967. The reversal of 629691945 is 549196926.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 629691945 - 2⁵ = 629691913 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20989717 + ... + 20989746.

It is an arithmetic number, because the mean of its divisors is an integer number (125938392).

Almost surely, 2^629691945 is an apocalyptic number.

It is an amenable number.

629691945 is a deficient number, since it is larger than the sum of its proper divisors (377815191).

629691945 is a wasteful number, since it uses less digits than its factorization.

629691945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41979471.

The product of its digits is 1049760, while the sum is 51.

The square root of 629691945 is about 25093.6634431882. The cubic root of 629691945 is about 857.1221385667.

The spelling of 629691945 in words is "six hundred twenty-nine million, six hundred ninety-one thousand, nine hundred forty-five".