40207613 has 2 divisors, whose sum is σ = 40207614. Its totient is φ = 40207612.

The previous prime is 40207577. The next prime is 40207621. The reversal of 40207613 is 31670204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22676644 + 17530969 = 4762^2 + 4187^2 .

It is a cyclic number.

It is not a de Polignac number, because 40207613 - 2¹⁰ = 40206589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40207633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20103806 + 20103807.

It is an arithmetic number, because the mean of its divisors is an integer number (20103807).

Almost surely, 2^40207613 is an apocalyptic number.

It is an amenable number.

40207613 is a deficient number, since it is larger than the sum of its proper divisors (1).

40207613 is an equidigital number, since it uses as much as digits as its factorization.

40207613 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 40207613 is about 6340.9473267013. The cubic root of 40207613 is about 342.5858573184.

Adding to 40207613 its reverse (31670204), we get a palindrome (71877817).

The spelling of 40207613 in words is "forty million, two hundred seven thousand, six hundred thirteen".