1972129706 has 4 divisors (see below), whose sum is σ = 2958194562. Its totient is φ = 986064852.

The previous prime is 1972129669. The next prime is 1972129721. The reversal of 1972129706 is 6079212791.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1691265625 + 280864081 = 41125^2 + 16759^2 .

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 as a sum of consecutive naturals, namely, 493032425 + ... + 493032428.

Almost surely, 2^1972129706 is an apocalyptic number.

1972129706 is a deficient number, since it is larger than the sum of its proper divisors (986064856).

1972129706 is an equidigital number, since it uses as much as digits as its factorization.

1972129706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 986064855.

The product of its (nonzero) digits is 95256, while the sum is 44.

The square root of 1972129706 is about 44408.6670144466. The cubic root of 1972129706 is about 1254.0412577882.

The spelling of 1972129706 in words is "one billion, nine hundred seventy-two million, one hundred twenty-nine thousand, seven hundred six".