305240623 has 2 divisors, whose sum is σ = 305240624. Its totient is φ = 305240622.

The previous prime is 305240609. The next prime is 305240629. The reversal of 305240623 is 326042503.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 305240623 - 2²¹ = 303143471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (305240629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152620311 + 152620312.

It is an arithmetic number, because the mean of its divisors is an integer number (152620312).

Almost surely, 2^305240623 is an apocalyptic number.

305240623 is a deficient number, since it is larger than the sum of its proper divisors (1).

305240623 is an equidigital number, since it uses as much as digits as its factorization.

305240623 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 25.

The square root of 305240623 is about 17471.1368548243. The cubic root of 305240623 is about 673.3085206086.

The spelling of 305240623 in words is "three hundred five million, two hundred forty thousand, six hundred twenty-three".