919115398623 has 4 divisors (see below), whose sum is σ = 1225487198168. Its totient is φ = 612743599080.

The previous prime is 919115398589. The next prime is 919115398661. The reversal of 919115398623 is 326893511919.

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

It is not a de Polignac number, because 919115398623 - 2⁹ = 919115398111 is a prime.

It is a super-2 number, since 2×919115398623² (a number of 25 digits) 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 (919115394623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 153185899768 + ... + 153185899773.

It is an arithmetic number, because the mean of its divisors is an integer number (306371799542).

Almost surely, 2^919115398623 is an apocalyptic number.

919115398623 is a deficient number, since it is larger than the sum of its proper divisors (306371799545).

919115398623 is a wasteful number, since it uses less digits than its factorization.

919115398623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306371799544.

The product of its digits is 3149280, while the sum is 57.

The spelling of 919115398623 in words is "nine hundred nineteen billion, one hundred fifteen million, three hundred ninety-eight thousand, six hundred twenty-three".