400214687 has 2 divisors, whose sum is σ = 400214688. Its totient is φ = 400214686.

The previous prime is 400214677. The next prime is 400214693. The reversal of 400214687 is 786412004.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 400214687 - 2⁶ = 400214623 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400214677) 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, 200107343 + 200107344.

It is an arithmetic number, because the mean of its divisors is an integer number (200107344).

Almost surely, 2^400214687 is an apocalyptic number.

400214687 is a deficient number, since it is larger than the sum of its proper divisors (1).

400214687 is an equidigital number, since it uses as much as digits as its factorization.

400214687 is an odious number, because the sum of its binary digits is odd.

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

The square root of 400214687 is about 20005.3664550290. The cubic root of 400214687 is about 736.9380950970.

The spelling of 400214687 in words is "four hundred million, two hundred fourteen thousand, six hundred eighty-seven".