405720463 has 2 divisors, whose sum is σ = 405720464. Its totient is φ = 405720462.

The previous prime is 405720451. The next prime is 405720533. The reversal of 405720463 is 364027504.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-405720463 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (405720163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202860231 + 202860232.

It is an arithmetic number, because the mean of its divisors is an integer number (202860232).

Almost surely, 2^405720463 is an apocalyptic number.

405720463 is a deficient number, since it is larger than the sum of its proper divisors (1).

405720463 is an equidigital number, since it uses as much as digits as its factorization.

405720463 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20160, while the sum is 31.

The square root of 405720463 is about 20142.5038910261. The cubic root of 405720463 is about 740.3020820486.

Adding to 405720463 its reverse (364027504), we get a palindrome (769747967).

The spelling of 405720463 in words is "four hundred five million, seven hundred twenty thousand, four hundred sixty-three".