1309942629 has 12 divisors (see below), whose sum is σ = 1910874732. Its totient is φ = 864648000.

The previous prime is 1309942619. The next prime is 1309942637. The reversal of 1309942629 is 9262499031.

It is a happy number.

1309942629 is a `hidden beast` number, since 13 + 0 + 9 + 9 + 4 + 2 + 629 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1147380129 + 162562500 = 33873^2 + 12750^2 .

It is not a de Polignac number, because 1309942629 - 2⁵ = 1309942597 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1309942619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 719632 + ... + 721449.

It is an arithmetic number, because the mean of its divisors is an integer number (159239561).

Almost surely, 2^1309942629 is an apocalyptic number.

It is an amenable number.

1309942629 is a deficient number, since it is larger than the sum of its proper divisors (600932103).

1309942629 is a wasteful number, since it uses less digits than its factorization.

1309942629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1441188 (or 1441185 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 45.

The square root of 1309942629 is about 36193.1295828366. The cubic root of 1309942629 is about 1094.1682079902.

The spelling of 1309942629 in words is "one billion, three hundred nine million, nine hundred forty-two thousand, six hundred twenty-nine".