1997389029 has 8 divisors (see below), whose sum is σ = 2689553952. Its totient is φ = 1318408400.

The previous prime is 1997389027. The next prime is 1997389039. The reversal of 1997389029 is 9209837991.

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

It is a cyclic number.

It is not a de Polignac number, because 1997389029 - 2¹ = 1997389027 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1997389029.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1997389021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3295719 + ... + 3296324.

It is an arithmetic number, because the mean of its divisors is an integer number (336194244).

Almost surely, 2^1997389029 is an apocalyptic number.

It is an amenable number.

1997389029 is a deficient number, since it is larger than the sum of its proper divisors (692164923).

1997389029 is a wasteful number, since it uses less digits than its factorization.

1997389029 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6592147.

The product of its (nonzero) digits is 2204496, while the sum is 57.

The square root of 1997389029 is about 44692.1584732713. The cubic root of 1997389029 is about 1259.3725415818.

The spelling of 1997389029 in words is "one billion, nine hundred ninety-seven million, three hundred eighty-nine thousand, twenty-nine".