619955023 has 4 divisors (see below), whose sum is σ = 620042040. Its totient is φ = 619868008.

The previous prime is 619954981. The next prime is 619955027. The reversal of 619955023 is 320559916.

It is a happy number.

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 619955023 - 2²¹ = 617857871 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (619955027) 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, 31765 + ... + 47422.

It is an arithmetic number, because the mean of its divisors is an integer number (155010510).

Almost surely, 2^619955023 is an apocalyptic number.

619955023 is a deficient number, since it is larger than the sum of its proper divisors (87017).

619955023 is an equidigital number, since it uses as much as digits as its factorization.

619955023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87016.

The product of its (nonzero) digits is 72900, while the sum is 40.

The square root of 619955023 is about 24898.8960197034. The cubic root of 619955023 is about 852.6812784891.

The spelling of 619955023 in words is "six hundred nineteen million, nine hundred fifty-five thousand, twenty-three".