623658953 has 2 divisors, whose sum is σ = 623658954. Its totient is φ = 623658952.

The previous prime is 623658901. The next prime is 623658977. The reversal of 623658953 is 359856326.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 335915584 + 287743369 = 18328^2 + 16963^2 .

It is a cyclic number.

It is not a de Polignac number, because 623658953 - 2⁸ = 623658697 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 623658898 and 623658907.

It is not a weakly prime, because it can be changed into another prime (623658353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311829476 + 311829477.

It is an arithmetic number, because the mean of its divisors is an integer number (311829477).

Almost surely, 2^623658953 is an apocalyptic number.

It is an amenable number.

623658953 is a deficient number, since it is larger than the sum of its proper divisors (1).

623658953 is an equidigital number, since it uses as much as digits as its factorization.

623658953 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1166400, while the sum is 47.

The square root of 623658953 is about 24973.1646572876. The cubic root of 623658953 is about 854.3760266196.

The spelling of 623658953 in words is "six hundred twenty-three million, six hundred fifty-eight thousand, nine hundred fifty-three".