622804991 has 8 divisors (see below), whose sum is σ = 637746384. Its totient is φ = 607884480.

The previous prime is 622804981. The next prime is 622805011. The reversal of 622804991 is 199408226.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 622804991 - 2¹⁰ = 622803967 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 (622804981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66881 + ... + 75621.

It is an arithmetic number, because the mean of its divisors is an integer number (79718298).

Almost surely, 2^622804991 is an apocalyptic number.

622804991 is a deficient number, since it is larger than the sum of its proper divisors (14941393).

622804991 is a wasteful number, since it uses less digits than its factorization.

622804991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10441.

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 622804991 is about 24956.0612076505. The cubic root of 622804991 is about 853.9858892852.

The spelling of 622804991 in words is "six hundred twenty-two million, eight hundred four thousand, nine hundred ninety-one".