619490985 has 32 divisors (see below), whose sum is σ = 1004529792. Its totient is φ = 325969920.

The previous prime is 619490983. The next prime is 619490987. The reversal of 619490985 is 589094916.

It is an interprime number because it is at equal distance from previous prime (619490983) and next prime (619490987).

It is not a de Polignac number, because 619490985 - 2¹ = 619490983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (619490983) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 786762 + ... + 787548.

It is an arithmetic number, because the mean of its divisors is an integer number (31391556).

Almost surely, 2^619490985 is an apocalyptic number.

It is an amenable number.

619490985 is a deficient number, since it is larger than the sum of its proper divisors (385038807).

619490985 is a wasteful number, since it uses less digits than its factorization.

619490985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1433.

The product of its (nonzero) digits is 699840, while the sum is 51.

The square root of 619490985 is about 24889.5758300538. The cubic root of 619490985 is about 852.4684806445.

It can be divided in two parts, 6194 and 90985, that added together give a palindrome (97179).

The spelling of 619490985 in words is "six hundred nineteen million, four hundred ninety thousand, nine hundred eighty-five".