40417409 has 2 divisors, whose sum is σ = 40417410. Its totient is φ = 40417408.

The previous prime is 40417373. The next prime is 40417439. The reversal of 40417409 is 90471404.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39025009 + 1392400 = 6247^2 + 1180^2 .

It is a cyclic number.

It is not a de Polignac number, because 40417409 - 2¹² = 40413313 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40417439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20208704 + 20208705.

It is an arithmetic number, because the mean of its divisors is an integer number (20208705).

Almost surely, 2^40417409 is an apocalyptic number.

It is an amenable number.

40417409 is a deficient number, since it is larger than the sum of its proper divisors (1).

40417409 is an equidigital number, since it uses as much as digits as its factorization.

40417409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 40417409 is about 6357.4687572964. The cubic root of 40417409 is about 343.1806741644.

The spelling of 40417409 in words is "forty million, four hundred seventeen thousand, four hundred nine".