622386987 has 4 divisors (see below), whose sum is σ = 829849320. Its totient is φ = 414924656.

The previous prime is 622386967. The next prime is 622387069. The reversal of 622386987 is 789683226.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-622386987 is a prime.

It is not an unprimeable number, because it can be changed into a prime (622386917) 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, 103731162 + ... + 103731167.

It is an arithmetic number, because the mean of its divisors is an integer number (207462330).

Almost surely, 2^622386987 is an apocalyptic number.

622386987 is a deficient number, since it is larger than the sum of its proper divisors (207462333).

622386987 is a wasteful number, since it uses less digits than its factorization.

622386987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207462332.

The product of its digits is 1741824, while the sum is 51.

The square root of 622386987 is about 24947.6850028214. The cubic root of 622386987 is about 853.7947917966.

The spelling of 622386987 in words is "six hundred twenty-two million, three hundred eighty-six thousand, nine hundred eighty-seven".