623947 has 2 divisors, whose sum is σ = 623948. Its totient is φ = 623946.

The previous prime is 623933. The next prime is 623957. The reversal of 623947 is 749326.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-623947 is a prime.

It is an Ulam number.

It is a plaindrome in base 13 and base 14.

It is not a weakly prime, because it can be changed into another prime (623957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311973 + 311974.

It is an arithmetic number, because the mean of its divisors is an integer number (311974).

2⁶²³⁹⁴⁷ is an apocalyptic number.

623947 is a deficient number, since it is larger than the sum of its proper divisors (1).

623947 is an equidigital number, since it uses as much as digits as its factorization.

623947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9072, while the sum is 31.

The square root of 623947 is about 789.9031586214. The cubic root of 623947 is about 85.4507542181.

The spelling of 623947 in words is "six hundred twenty-three thousand, nine hundred forty-seven".