40909501 has 2 divisors, whose sum is σ = 40909502. Its totient is φ = 40909500.

The previous prime is 40909487. The next prime is 40909529. The reversal of 40909501 is 10590904.

It is an a-pointer prime, because the next prime (40909529) can be obtained adding 40909501 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39677401 + 1232100 = 6299^2 + 1110^2 .

It is a cyclic number.

It is not a de Polignac number, because 40909501 - 2²³ = 32520893 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40909501.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40909591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20454750 + 20454751.

It is an arithmetic number, because the mean of its divisors is an integer number (20454751).

Almost surely, 2^40909501 is an apocalyptic number.

It is an amenable number.

40909501 is a deficient number, since it is larger than the sum of its proper divisors (1).

40909501 is an equidigital number, since it uses as much as digits as its factorization.

40909501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 40909501 is about 6396.0535488690. The cubic root of 40909501 is about 344.5678296507.

The spelling of 40909501 in words is "forty million, nine hundred nine thousand, five hundred one".