629149909 has 4 divisors (see below), whose sum is σ = 641020716. Its totient is φ = 617279104.

The previous prime is 629149891. The next prime is 629149931. The reversal of 629149909 is 909941926.

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 549761809 + 79388100 = 23447^2 + 8910^2 .

It is a cyclic number.

It is not a de Polignac number, because 629149909 - 2¹¹ = 629147861 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 (629149949) 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, 5935324 + ... + 5935429.

It is an arithmetic number, because the mean of its divisors is an integer number (160255179).

Almost surely, 2^629149909 is an apocalyptic number.

It is an amenable number.

629149909 is a deficient number, since it is larger than the sum of its proper divisors (11870807).

629149909 is a wasteful number, since it uses less digits than its factorization.

629149909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11870806.

The product of its (nonzero) digits is 314928, while the sum is 49.

The square root of 629149909 is about 25082.8608615525. The cubic root of 629149909 is about 856.8761323362.

The spelling of 629149909 in words is "six hundred twenty-nine million, one hundred forty-nine thousand, nine hundred nine".