1989992929 has 4 divisors (see below), whose sum is σ = 2019694384. Its totient is φ = 1960291476.

The previous prime is 1989992923. The next prime is 1989992947. The reversal of 1989992929 is 9292999891.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1989992929 - 2⁵ = 1989992897 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (67), and also a Moran number because the ratio is a prime number: 29701387 = 1989992929 / (1 + 9 + 8 + 9 + 9 + 9 + 2 + 9 + 2 + 9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1989992923) by changing a digit.

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, 14850627 + ... + 14850760.

It is an arithmetic number, because the mean of its divisors is an integer number (504923596).

Almost surely, 2^1989992929 is an apocalyptic number.

It is an amenable number.

1989992929 is a deficient number, since it is larger than the sum of its proper divisors (29701455).

1989992929 is an equidigital number, since it uses as much as digits as its factorization.

1989992929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29701454.

The product of its digits is 17006112, while the sum is 67.

The square root of 1989992929 is about 44609.3367917525. The cubic root of 1989992929 is about 1257.8161821547.

It can be divided in two parts, 1989992 and 929, that added together give a square (1990921 = 1411²).

The spelling of 1989992929 in words is "one billion, nine hundred eighty-nine million, nine hundred ninety-two thousand, nine hundred twenty-nine".