398153663 has 2 divisors, whose sum is σ = 398153664. Its totient is φ = 398153662.

The previous prime is 398153627. The next prime is 398153689. The reversal of 398153663 is 366351893.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 398153663 - 2¹² = 398149567 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (398153603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199076831 + 199076832.

It is an arithmetic number, because the mean of its divisors is an integer number (199076832).

Almost surely, 2^398153663 is an apocalyptic number.

398153663 is a deficient number, since it is larger than the sum of its proper divisors (1).

398153663 is an equidigital number, since it uses as much as digits as its factorization.

398153663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 349920, while the sum is 44.

The square root of 398153663 is about 19953.7881867078. The cubic root of 398153663 is about 735.6708903642.

The spelling of 398153663 in words is "three hundred ninety-eight million, one hundred fifty-three thousand, six hundred sixty-three".