402355477 has 2 divisors, whose sum is σ = 402355478. Its totient is φ = 402355476.

The previous prime is 402355463. The next prime is 402355517. The reversal of 402355477 is 774553204.

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., 326561041 + 75794436 = 18071^2 + 8706^2 .

It is a cyclic number.

It is not a de Polignac number, because 402355477 - 2¹⁹ = 401831189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402356477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201177738 + 201177739.

It is an arithmetic number, because the mean of its divisors is an integer number (201177739).

Almost surely, 2^402355477 is an apocalyptic number.

It is an amenable number.

402355477 is a deficient number, since it is larger than the sum of its proper divisors (1).

402355477 is an equidigital number, since it uses as much as digits as its factorization.

402355477 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 117600, while the sum is 37.

The square root of 402355477 is about 20058.8004875665. The cubic root of 402355477 is about 738.2497453329.

The spelling of 402355477 in words is "four hundred two million, three hundred fifty-five thousand, four hundred seventy-seven".