400030087 has 2 divisors, whose sum is σ = 400030088. Its totient is φ = 400030086.

The previous prime is 400030073. The next prime is 400030129. The reversal of 400030087 is 780030004.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 400030087 - 2¹¹ = 400028039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400030027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200015043 + 200015044.

It is an arithmetic number, because the mean of its divisors is an integer number (200015044).

Almost surely, 2^400030087 is an apocalyptic number.

400030087 is a deficient number, since it is larger than the sum of its proper divisors (1).

400030087 is an equidigital number, since it uses as much as digits as its factorization.

400030087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 400030087 is about 20000.7521608564. The cubic root of 400030087 is about 736.8247728409.

The spelling of 400030087 in words is "four hundred million, thirty thousand, eighty-seven".