400304077 has 2 divisors, whose sum is σ = 400304078. Its totient is φ = 400304076.

The previous prime is 400304053. The next prime is 400304129. The reversal of 400304077 is 770403004.

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., 233661796 + 166642281 = 15286^2 + 12909^2 .

It is a cyclic number.

It is not a de Polignac number, because 400304077 - 2²⁷ = 266086349 is a prime.

It is equal to p_21351652 and since 400304077 and 21351652 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400304017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200152038 + 200152039.

It is an arithmetic number, because the mean of its divisors is an integer number (200152039).

Almost surely, 2^400304077 is an apocalyptic number.

It is an amenable number.

400304077 is a deficient number, since it is larger than the sum of its proper divisors (1).

400304077 is an equidigital number, since it uses as much as digits as its factorization.

400304077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2352, while the sum is 25.

The square root of 400304077 is about 20007.6004808173. The cubic root of 400304077 is about 736.9929573118.

The spelling of 400304077 in words is "four hundred million, three hundred four thousand, seventy-seven".