619983989 has 4 divisors (see below), whose sum is σ = 622715424. Its totient is φ = 617252556.

The previous prime is 619983979. The next prime is 619984007. The reversal of 619983989 is 989389916.

619983989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 a de Polignac number, because none of the positive numbers 2^k-619983989 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 (619983979) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1365377 + ... + 1365830.

It is an arithmetic number, because the mean of its divisors is an integer number (155678856).

Almost surely, 2^619983989 is an apocalyptic number.

It is an amenable number.

619983989 is a deficient number, since it is larger than the sum of its proper divisors (2731435).

619983989 is a wasteful number, since it uses less digits than its factorization.

619983989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2731434.

The product of its digits is 7558272, while the sum is 62.

The square root of 619983989 is about 24899.4776852849. The cubic root of 619983989 is about 852.6945581520.

The spelling of 619983989 in words is "six hundred nineteen million, nine hundred eighty-three thousand, nine hundred eighty-nine".