619994423 has 4 divisors (see below), whose sum is σ = 630158328. Its totient is φ = 609830520.

The previous prime is 619994407. The next prime is 619994429. The reversal of 619994423 is 324499916.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 619994423 - 2⁴ = 619994407 is a prime.

It is a super-2 number, since 2×619994423² = 768786169102205858, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (619994429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5081861 + ... + 5081982.

It is an arithmetic number, because the mean of its divisors is an integer number (157539582).

Almost surely, 2^619994423 is an apocalyptic number.

619994423 is a deficient number, since it is larger than the sum of its proper divisors (10163905).

619994423 is a wasteful number, since it uses less digits than its factorization.

619994423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10163904.

The product of its digits is 419904, while the sum is 47.

The square root of 619994423 is about 24899.6872068707. The cubic root of 619994423 is about 852.6993415901.

The spelling of 619994423 in words is "six hundred nineteen million, nine hundred ninety-four thousand, four hundred twenty-three".