318489623 has 2 divisors, whose sum is σ = 318489624. Its totient is φ = 318489622.

The previous prime is 318489593. The next prime is 318489637. The reversal of 318489623 is 326984813.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 318489623 - 2¹² = 318485527 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (318489643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159244811 + 159244812.

It is an arithmetic number, because the mean of its divisors is an integer number (159244812).

Almost surely, 2^318489623 is an apocalyptic number.

318489623 is a deficient number, since it is larger than the sum of its proper divisors (1).

318489623 is an equidigital number, since it uses as much as digits as its factorization.

318489623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 248832, while the sum is 44.

The square root of 318489623 is about 17846.2775670446. The cubic root of 318489623 is about 682.9125526589.

The spelling of 318489623 in words is "three hundred eighteen million, four hundred eighty-nine thousand, six hundred twenty-three".