623199155 has 4 divisors (see below), whose sum is σ = 747838992. Its totient is φ = 498559320.

The previous prime is 623199121. The next prime is 623199167. The reversal of 623199155 is 551991326.

It is a happy number.

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

It is not a de Polignac number, because 623199155 - 2⁸ = 623198899 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62319911 + ... + 62319920.

It is an arithmetic number, because the mean of its divisors is an integer number (186959748).

Almost surely, 2^623199155 is an apocalyptic number.

623199155 is a deficient number, since it is larger than the sum of its proper divisors (124639837).

623199155 is a wasteful number, since it uses less digits than its factorization.

623199155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124639836.

The product of its digits is 72900, while the sum is 41.

The square root of 623199155 is about 24963.9571182135. The cubic root of 623199155 is about 854.1660096075.

The spelling of 623199155 in words is "six hundred twenty-three million, one hundred ninety-nine thousand, one hundred fifty-five".