40712689 has 2 divisors, whose sum is σ = 40712690. Its totient is φ = 40712688.

The previous prime is 40712647. The next prime is 40712717. The reversal of 40712689 is 98621704.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35605089 + 5107600 = 5967^2 + 2260^2 .

It is a cyclic number.

It is not a de Polignac number, because 40712689 - 2¹⁷ = 40581617 is a prime.

It is a super-2 number, since 2×40712689² = 3315046091221442, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40712489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20356344 + 20356345.

It is an arithmetic number, because the mean of its divisors is an integer number (20356345).

Almost surely, 2^40712689 is an apocalyptic number.

It is an amenable number.

40712689 is a deficient number, since it is larger than the sum of its proper divisors (1).

40712689 is an equidigital number, since it uses as much as digits as its factorization.

40712689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 40712689 is about 6380.6495750825. The cubic root of 40712689 is about 344.0143793566.

The spelling of 40712689 in words is "forty million, seven hundred twelve thousand, six hundred eighty-nine".