1987930229 has 4 divisors (see below), whose sum is σ = 1988198700. Its totient is φ = 1987661760.

The previous prime is 1987930199. The next prime is 1987930249. The reversal of 1987930229 is 9220397891.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9220397891 = 37 ⋅249199943.

It can be written as a sum of positive squares in 2 ways, for example, as 1270922500 + 717007729 = 35650^2 + 26777^2 .

It is a cyclic number.

It is not a de Polignac number, because 1987930229 - 2²⁴ = 1971153013 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1987930249) 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 3 ways as a sum of consecutive naturals, for example, 122804 + ... + 138045.

It is an arithmetic number, because the mean of its divisors is an integer number (497049675).

Almost surely, 2^1987930229 is an apocalyptic number.

It is an amenable number.

1987930229 is a deficient number, since it is larger than the sum of its proper divisors (268471).

1987930229 is an equidigital number, since it uses as much as digits as its factorization.

1987930229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268470.

The product of its (nonzero) digits is 489888, while the sum is 50.

The square root of 1987930229 is about 44586.2111980823. The cubic root of 1987930229 is about 1257.3814411819.

The spelling of 1987930229 in words is "one billion, nine hundred eighty-seven million, nine hundred thirty thousand, two hundred twenty-nine".