622688091 has 4 divisors (see below), whose sum is σ = 830250792. Its totient is φ = 415125392.

The previous prime is 622688081. The next prime is 622688093. The reversal of 622688091 is 190886226.

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 622688091 - 2¹⁵ = 622655323 is a prime.

It is not an unprimeable number, because it can be changed into a prime (622688093) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103781346 + ... + 103781351.

It is an arithmetic number, because the mean of its divisors is an integer number (207562698).

Almost surely, 2^622688091 is an apocalyptic number.

622688091 is a deficient number, since it is larger than the sum of its proper divisors (207562701).

622688091 is a wasteful number, since it uses less digits than its factorization.

622688091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207562700.

The product of its (nonzero) digits is 82944, while the sum is 42.

The square root of 622688091 is about 24953.7189813462. The cubic root of 622688091 is about 853.9324551185.

The spelling of 622688091 in words is "six hundred twenty-two million, six hundred eighty-eight thousand, ninety-one".