619462321 has 3 divisors (see below), whose sum is σ = 619487211. Its totient is φ = 619437432.

The previous prime is 619462309. The next prime is 619462331. The reversal of 619462321 is 123264916.

It is a happy number.

The square root of 619462321 is 24889.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 2436721 + 617025600 = 1561^2 + 24840^2 .

It is not a de Polignac number, because 619462321 - 2¹⁷ = 619331249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (619462331) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 12445 + ... + 37333.

It is an arithmetic number, because the mean of its divisors is an integer number (206495737).

Almost surely, 2^619462321 is an apocalyptic number.

619462321 is the 24889-th square number.

619462321 is the 12445-th centered octagonal number.

It is an amenable number.

619462321 is a deficient number, since it is larger than the sum of its proper divisors (24890).

619462321 is an frugal number, since it uses more digits than its factorization.

619462321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49778 (or 24889 counting only the distinct ones).

The product of its digits is 15552, while the sum is 34.

The cubic root of 619462321 is about 852.4553324664.

The spelling of 619462321 in words is "six hundred nineteen million, four hundred sixty-two thousand, three hundred twenty-one".