1999970629 has 2 divisors, whose sum is σ = 1999970630. Its totient is φ = 1999970628.

The previous prime is 1999970617. The next prime is 1999970641. The reversal of 1999970629 is 9260799991.

It is a balanced prime because it is at equal distance from previous prime (1999970617) and next prime (1999970641).

It can be written as a sum of positive squares in only one way, i.e., 1575693025 + 424277604 = 39695^2 + 20598^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1999970629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1999970669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 999985314 + 999985315.

It is an arithmetic number, because the mean of its divisors is an integer number (999985315).

Almost surely, 2^1999970629 is an apocalyptic number.

It is an amenable number.

1999970629 is a deficient number, since it is larger than the sum of its proper divisors (1).

1999970629 is an equidigital number, since it uses as much as digits as its factorization.

1999970629 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4960116, while the sum is 61.

The square root of 1999970629 is about 44721.0311710274. The cubic root of 1999970629 is about 1259.9148823412.

The spelling of 1999970629 in words is "one billion, nine hundred ninety-nine million, nine hundred seventy thousand, six hundred twenty-nine".