40977689 has 2 divisors, whose sum is σ = 40977690. Its totient is φ = 40977688.

The previous prime is 40977613. The next prime is 40977707. The reversal of 40977689 is 98677904.

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., 40960000 + 17689 = 6400^2 + 133^2 .

It is a cyclic number.

It is not a de Polignac number, because 40977689 - 2¹² = 40973593 is a prime.

It is not a weakly prime, because it can be changed into another prime (40977289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20488844 + 20488845.

It is an arithmetic number, because the mean of its divisors is an integer number (20488845).

Almost surely, 2^40977689 is an apocalyptic number.

It is an amenable number.

40977689 is a deficient number, since it is larger than the sum of its proper divisors (1).

40977689 is an equidigital number, since it uses as much as digits as its factorization.

40977689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 762048, while the sum is 50.

The square root of 40977689 is about 6401.3818039545. The cubic root of 40977689 is about 344.7591653927.

The spelling of 40977689 in words is "forty million, nine hundred seventy-seven thousand, six hundred eighty-nine".