40997777 has 2 divisors, whose sum is σ = 40997778. Its totient is φ = 40997776.

The previous prime is 40997689. The next prime is 40997807. The reversal of 40997777 is 77779904.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38551681 + 2446096 = 6209^2 + 1564^2 .

It is a cyclic number.

It is not a de Polignac number, because 40997777 - 2²⁴ = 24220561 is a prime.

It is not a weakly prime, because it can be changed into another prime (40997977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20498888 + 20498889.

It is an arithmetic number, because the mean of its divisors is an integer number (20498889).

Almost surely, 2^40997777 is an apocalyptic number.

It is an amenable number.

40997777 is a deficient number, since it is larger than the sum of its proper divisors (1).

40997777 is an equidigital number, since it uses as much as digits as its factorization.

40997777 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 777924, while the sum is 50.

The square root of 40997777 is about 6402.9506479435. The cubic root of 40997777 is about 344.8154919037.

The spelling of 40997777 in words is "forty million, nine hundred ninety-seven thousand, seven hundred seventy-seven".