619448891 has 2 divisors, whose sum is σ = 619448892. Its totient is φ = 619448890.

The previous prime is 619448833. The next prime is 619448909. The reversal of 619448891 is 198844916.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 619448891 - 2¹⁸ = 619186747 is a prime.

It is a super-2 number, since 2×619448891² = 767433857122259762, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (619448821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 309724445 + 309724446.

It is an arithmetic number, because the mean of its divisors is an integer number (309724446).

Almost surely, 2^619448891 is an apocalyptic number.

619448891 is a deficient number, since it is larger than the sum of its proper divisors (1).

619448891 is an equidigital number, since it uses as much as digits as its factorization.

619448891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 497664, while the sum is 50.

The square root of 619448891 is about 24888.7302006350. The cubic root of 619448891 is about 852.4491719853.

The spelling of 619448891 in words is "six hundred nineteen million, four hundred forty-eight thousand, eight hundred ninety-one".