40861517 has 2 divisors, whose sum is σ = 40861518. Its totient is φ = 40861516.

The previous prime is 40861507. The next prime is 40861519. The reversal of 40861517 is 71516804.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21799561 + 19061956 = 4669^2 + 4366^2 .

It is a cyclic number.

It is not a de Polignac number, because 40861517 - 2¹⁶ = 40795981 is a prime.

Together with 40861519, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40861519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20430758 + 20430759.

It is an arithmetic number, because the mean of its divisors is an integer number (20430759).

Almost surely, 2^40861517 is an apocalyptic number.

It is an amenable number.

40861517 is a deficient number, since it is larger than the sum of its proper divisors (1).

40861517 is an equidigital number, since it uses as much as digits as its factorization.

40861517 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6720, while the sum is 32.

The square root of 40861517 is about 6392.3013852602. The cubic root of 40861517 is about 344.4330589099.

The spelling of 40861517 in words is "forty million, eight hundred sixty-one thousand, five hundred seventeen".