619959812 has 6 divisors (see below), whose sum is σ = 1084929678. Its totient is φ = 309979904.

The previous prime is 619959773. The next prime is 619959841. The reversal of 619959812 is 218959916.

It can be written as a sum of positive squares in only one way, i.e., 619810816 + 148996 = 24896^2 + 386^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77494973 + ... + 77494980.

It is an arithmetic number, because the mean of its divisors is an integer number (180821613).

Almost surely, 2^619959812 is an apocalyptic number.

It is an amenable number.

619959812 is a deficient number, since it is larger than the sum of its proper divisors (464969866).

619959812 is a wasteful number, since it uses less digits than its factorization.

619959812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154989957 (or 154989955 counting only the distinct ones).

The product of its digits is 349920, while the sum is 50.

The square root of 619959812 is about 24898.9921884401. The cubic root of 619959812 is about 852.6834740678.

The spelling of 619959812 in words is "six hundred nineteen million, nine hundred fifty-nine thousand, eight hundred twelve".