405423247 has 2 divisors, whose sum is σ = 405423248. Its totient is φ = 405423246.

The previous prime is 405423233. The next prime is 405423281. The reversal of 405423247 is 742324504.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-405423247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (405423947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202711623 + 202711624.

It is an arithmetic number, because the mean of its divisors is an integer number (202711624).

Almost surely, 2^405423247 is an apocalyptic number.

405423247 is a deficient number, since it is larger than the sum of its proper divisors (1).

405423247 is an equidigital number, since it uses as much as digits as its factorization.

405423247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26880, while the sum is 31.

The square root of 405423247 is about 20135.1247078333. The cubic root of 405423247 is about 740.1212651282.

The spelling of 405423247 in words is "four hundred five million, four hundred twenty-three thousand, two hundred forty-seven".