40809463 has 2 divisors, whose sum is σ = 40809464. Its totient is φ = 40809462.

The previous prime is 40809413. The next prime is 40809487. The reversal of 40809463 is 36490804.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40809463 is a prime.

It is equal to p_2479930 and since 40809463 and 2479930 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40809413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20404731 + 20404732.

It is an arithmetic number, because the mean of its divisors is an integer number (20404732).

Almost surely, 2^40809463 is an apocalyptic number.

40809463 is a deficient number, since it is larger than the sum of its proper divisors (1).

40809463 is an equidigital number, since it uses as much as digits as its factorization.

40809463 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 40809463 is about 6388.2284711804. The cubic root of 40809463 is about 344.2867375580.

The spelling of 40809463 in words is "forty million, eight hundred nine thousand, four hundred sixty-three".