1309664942 has 8 divisors (see below), whose sum is σ = 2049910416. Its totient is φ = 626361472.

The previous prime is 1309664933. The next prime is 1309664957. The reversal of 1309664942 is 2494669031.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 1309664893 and 1309664902.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14235443 + ... + 14235534.

It is an arithmetic number, because the mean of its divisors is an integer number (256238802).

Almost surely, 2^1309664942 is an apocalyptic number.

1309664942 is a deficient number, since it is larger than the sum of its proper divisors (740245474).

1309664942 is a wasteful number, since it uses less digits than its factorization.

1309664942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28471002.

The product of its (nonzero) digits is 279936, while the sum is 44.

The square root of 1309664942 is about 36189.2931956401. The cubic root of 1309664942 is about 1094.0908871080.

The spelling of 1309664942 in words is "one billion, three hundred nine million, six hundred sixty-four thousand, nine hundred forty-two".