398203099477 has 4 divisors (see below), whose sum is σ = 403243645120. Its totient is φ = 393162553836.

The previous prime is 398203099403. The next prime is 398203099513. The reversal of 398203099477 is 774990302893.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 774990302893 = 929 ⋅834219917.

It is a cyclic number.

It is not a de Polignac number, because 398203099477 - 2²³ = 398194710869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398203099577) 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 in 3 ways as a sum of consecutive naturals, for example, 2520272703 + ... + 2520272860.

It is an arithmetic number, because the mean of its divisors is an integer number (100810911280).

Almost surely, 2^398203099477 is an apocalyptic number.

It is an amenable number.

398203099477 is a deficient number, since it is larger than the sum of its proper divisors (5040545643).

398203099477 is an equidigital number, since it uses as much as digits as its factorization.

398203099477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5040545642.

The product of its (nonzero) digits is 20575296, while the sum is 61.

The spelling of 398203099477 in words is "three hundred ninety-eight billion, two hundred three million, ninety-nine thousand, four hundred seventy-seven".