398544451 has 2 divisors, whose sum is σ = 398544452. Its totient is φ = 398544450.

The previous prime is 398544409. The next prime is 398544499. The reversal of 398544451 is 154445893.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 398544451 - 2²¹ = 396447299 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 398544398 and 398544407.

It is not a weakly prime, because it can be changed into another prime (398542451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199272225 + 199272226.

It is an arithmetic number, because the mean of its divisors is an integer number (199272226).

Almost surely, 2^398544451 is an apocalyptic number.

398544451 is a deficient number, since it is larger than the sum of its proper divisors (1).

398544451 is an equidigital number, since it uses as much as digits as its factorization.

398544451 is an evil number, because the sum of its binary digits is even.

The product of its digits is 345600, while the sum is 43.

The square root of 398544451 is about 19963.5781111503. The cubic root of 398544451 is about 735.9114987660.

The spelling of 398544451 in words is "three hundred ninety-eight million, five hundred forty-four thousand, four hundred fifty-one".