3129699730 has 8 divisors (see below), whose sum is σ = 5633459532. Its totient is φ = 1251879888.

The previous prime is 3129699721. The next prime is 3129699743. The reversal of 3129699730 is 379969213.

It can be written as a sum of positive squares in 2 ways, for example, as 3103269849 + 26429881 = 55707^2 + 5141^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 156484977 + ... + 156484996.

Almost surely, 2^3129699730 is an apocalyptic number.

3129699730 is a deficient number, since it is larger than the sum of its proper divisors (2503759802).

3129699730 is a wasteful number, since it uses less digits than its factorization.

3129699730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312969980.

The product of its (nonzero) digits is 551124, while the sum is 49.

The square root of 3129699730 is about 55943.7193078901. The cubic root of 3129699730 is about 1462.7414136750.

The spelling of 3129699730 in words is "three billion, one hundred twenty-nine million, six hundred ninety-nine thousand, seven hundred thirty".