622385987 has 2 divisors, whose sum is σ = 622385988. Its totient is φ = 622385986.

The previous prime is 622385947. The next prime is 622386013. The reversal of 622385987 is 789583226.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-622385987 is a prime.

It is not a weakly prime, because it can be changed into another prime (622385927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311192993 + 311192994.

It is an arithmetic number, because the mean of its divisors is an integer number (311192994).

Almost surely, 2^622385987 is an apocalyptic number.

622385987 is a deficient number, since it is larger than the sum of its proper divisors (1).

622385987 is an equidigital number, since it uses as much as digits as its factorization.

622385987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1451520, while the sum is 50.

The square root of 622385987 is about 24947.6649608736. The cubic root of 622385987 is about 853.7943345274.

The spelling of 622385987 in words is "six hundred twenty-two million, three hundred eighty-five thousand, nine hundred eighty-seven".