400010077 has 2 divisors, whose sum is σ = 400010078. Its totient is φ = 400010076.

The previous prime is 400010057. The next prime is 400010111. The reversal of 400010077 is 770010004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 385179876 + 14830201 = 19626^2 + 3851^2 .

It is a cyclic number.

It is not a de Polignac number, because 400010077 - 2¹⁹ = 399485789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400010057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200005038 + 200005039.

It is an arithmetic number, because the mean of its divisors is an integer number (200005039).

Almost surely, 2^400010077 is an apocalyptic number.

It is an amenable number.

400010077 is a deficient number, since it is larger than the sum of its proper divisors (1).

400010077 is an equidigital number, since it uses as much as digits as its factorization.

400010077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 196, while the sum is 19.

The square root of 400010077 is about 20000.2519234134. The cubic root of 400010077 is about 736.8124870070.

The spelling of 400010077 in words is "four hundred million, ten thousand, seventy-seven".