40206653 has 2 divisors, whose sum is σ = 40206654. Its totient is φ = 40206652.

The previous prime is 40206637. The next prime is 40206707. The reversal of 40206653 is 35660204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39212644 + 994009 = 6262^2 + 997^2 .

It is a cyclic number.

It is not a de Polignac number, because 40206653 - 2⁴ = 40206637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40206613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20103326 + 20103327.

It is an arithmetic number, because the mean of its divisors is an integer number (20103327).

Almost surely, 2^40206653 is an apocalyptic number.

It is an amenable number.

40206653 is a deficient number, since it is larger than the sum of its proper divisors (1).

40206653 is an equidigital number, since it uses as much as digits as its factorization.

40206653 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 26.

The square root of 40206653 is about 6340.8716277812. The cubic root of 40206653 is about 342.5831307615.

Adding to 40206653 its reverse (35660204), we get a palindrome (75866857).

The spelling of 40206653 in words is "forty million, two hundred six thousand, six hundred fifty-three".