40977961 has 2 divisors, whose sum is σ = 40977962. Its totient is φ = 40977960.

The previous prime is 40977931. The next prime is 40977997. The reversal of 40977961 is 16977904.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38192400 + 2785561 = 6180^2 + 1669^2 .

It is a cyclic number.

It is not a de Polignac number, because 40977961 - 2⁹ = 40977449 is a prime.

It is not a weakly prime, because it can be changed into another prime (40977931) 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, 20488980 + 20488981.

It is an arithmetic number, because the mean of its divisors is an integer number (20488981).

Almost surely, 2^40977961 is an apocalyptic number.

It is an amenable number.

40977961 is a deficient number, since it is larger than the sum of its proper divisors (1).

40977961 is an equidigital number, since it uses as much as digits as its factorization.

40977961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 95256, while the sum is 43.

The square root of 40977961 is about 6401.4030493322. The cubic root of 40977961 is about 344.7599282004.

The spelling of 40977961 in words is "forty million, nine hundred seventy-seven thousand, nine hundred sixty-one".