400068077 has 2 divisors, whose sum is σ = 400068078. Its totient is φ = 400068076.

The previous prime is 400068059. The next prime is 400068103. The reversal of 400068077 is 770860004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 328733161 + 71334916 = 18131^2 + 8446^2 .

It is a cyclic number.

It is not a de Polignac number, because 400068077 - 2⁸ = 400067821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400068017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200034038 + 200034039.

It is an arithmetic number, because the mean of its divisors is an integer number (200034039).

Almost surely, 2^400068077 is an apocalyptic number.

It is an amenable number.

400068077 is a deficient number, since it is larger than the sum of its proper divisors (1).

400068077 is an equidigital number, since it uses as much as digits as its factorization.

400068077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9408, while the sum is 32.

The square root of 400068077 is about 20001.7018525924. The cubic root of 400068077 is about 736.8480969924.

The spelling of 400068077 in words is "four hundred million, sixty-eight thousand, seventy-seven".