40650409 has 2 divisors, whose sum is σ = 40650410. Its totient is φ = 40650408.

The previous prime is 40650397. The next prime is 40650413. The reversal of 40650409 is 90405604.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39501225 + 1149184 = 6285^2 + 1072^2 .

It is a cyclic number.

It is not a de Polignac number, because 40650409 - 2²¹ = 38553257 is a prime.

It is not a weakly prime, because it can be changed into another prime (40650209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20325204 + 20325205.

It is an arithmetic number, because the mean of its divisors is an integer number (20325205).

Almost surely, 2^40650409 is an apocalyptic number.

It is an amenable number.

40650409 is a deficient number, since it is larger than the sum of its proper divisors (1).

40650409 is an equidigital number, since it uses as much as digits as its factorization.

40650409 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 28.

The square root of 40650409 is about 6375.7673263694. The cubic root of 40650409 is about 343.8388718313.

The spelling of 40650409 in words is "forty million, six hundred fifty thousand, four hundred nine".