398146087 has 2 divisors, whose sum is σ = 398146088. Its totient is φ = 398146086.

The previous prime is 398146081. The next prime is 398146109. The reversal of 398146087 is 780641893.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 398146087 - 2¹¹ = 398144039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (398146081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199073043 + 199073044.

It is an arithmetic number, because the mean of its divisors is an integer number (199073044).

Almost surely, 2^398146087 is an apocalyptic number.

398146087 is a deficient number, since it is larger than the sum of its proper divisors (1).

398146087 is an equidigital number, since it uses as much as digits as its factorization.

398146087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 290304, while the sum is 46.

The square root of 398146087 is about 19953.5983471654. The cubic root of 398146087 is about 735.6662242612. Note that the first 3 decimals are identical.

The spelling of 398146087 in words is "three hundred ninety-eight million, one hundred forty-six thousand, eighty-seven".