402186047 has 2 divisors, whose sum is σ = 402186048. Its totient is φ = 402186046.

The previous prime is 402186019. The next prime is 402186079. The reversal of 402186047 is 740681204.

It is an a-pointer prime, because the next prime (402186079) can be obtained adding 402186047 to its sum of digits (32).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 402186047 - 2¹⁰ = 402185023 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402186647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201093023 + 201093024.

It is an arithmetic number, because the mean of its divisors is an integer number (201093024).

Almost surely, 2^402186047 is an apocalyptic number.

402186047 is a deficient number, since it is larger than the sum of its proper divisors (1).

402186047 is an equidigital number, since it uses as much as digits as its factorization.

402186047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10752, while the sum is 32.

The square root of 402186047 is about 20054.5767095693. The cubic root of 402186047 is about 738.1461062850.

The spelling of 402186047 in words is "four hundred two million, one hundred eighty-six thousand, forty-seven".