398234933 has 4 divisors (see below), whose sum is σ = 400435308. Its totient is φ = 396034560.

The previous prime is 398234923. The next prime is 398234981. The reversal of 398234933 is 339432893.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 339432893 = 1579 ⋅214967.

It can be written as a sum of positive squares in 2 ways, for example, as 20593444 + 377641489 = 4538^2 + 19433^2 .

It is a cyclic number.

It is not a de Polignac number, because 398234933 - 2⁶ = 398234869 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 (398234923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1099916 + ... + 1100277.

It is an arithmetic number, because the mean of its divisors is an integer number (100108827).

Almost surely, 2^398234933 is an apocalyptic number.

It is an amenable number.

398234933 is a deficient number, since it is larger than the sum of its proper divisors (2200375).

398234933 is a wasteful number, since it uses less digits than its factorization.

398234933 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2200374.

The product of its digits is 419904, while the sum is 44.

The square root of 398234933 is about 19955.8245382144. The cubic root of 398234933 is about 735.7209413130.

The spelling of 398234933 in words is "three hundred ninety-eight million, two hundred thirty-four thousand, nine hundred thirty-three".