626323987 has 2 divisors, whose sum is σ = 626323988. Its totient is φ = 626323986.

The previous prime is 626323937. The next prime is 626324029. The reversal of 626323987 is 789323626.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-626323987 is a prime.

It is not a weakly prime, because it can be changed into another prime (626323937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 313161993 + 313161994.

It is an arithmetic number, because the mean of its divisors is an integer number (313161994).

Almost surely, 2^626323987 is an apocalyptic number.

626323987 is a deficient number, since it is larger than the sum of its proper divisors (1).

626323987 is an equidigital number, since it uses as much as digits as its factorization.

626323987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 653184, while the sum is 46.

The square root of 626323987 is about 25026.4657313013. The cubic root of 626323987 is about 855.5912771096.

The spelling of 626323987 in words is "six hundred twenty-six million, three hundred twenty-three thousand, nine hundred eighty-seven".