619123049 has 4 divisors (see below), whose sum is σ = 629616720. Its totient is φ = 608629380.

The previous prime is 619123019. The next prime is 619123091. The reversal of 619123049 is 940321916.

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 not a de Polignac number, because 619123049 - 2¹² = 619118953 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (619123019) 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, 5246747 + ... + 5246864.

It is an arithmetic number, because the mean of its divisors is an integer number (157404180).

Almost surely, 2^619123049 is an apocalyptic number.

It is an amenable number.

619123049 is a deficient number, since it is larger than the sum of its proper divisors (10493671).

619123049 is a wasteful number, since it uses less digits than its factorization.

619123049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10493670.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 619123049 is about 24882.1833648094. The cubic root of 619123049 is about 852.2996775640.

The spelling of 619123049 in words is "six hundred nineteen million, one hundred twenty-three thousand, forty-nine".