398981620843 has 4 divisors (see below), whose sum is σ = 429672514768. Its totient is φ = 368290726920.

The previous prime is 398981620841. The next prime is 398981620889. The reversal of 398981620843 is 348026189893.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 398981620843 - 2¹ = 398981620841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (398981620841) 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, 15345446943 + ... + 15345446968.

It is an arithmetic number, because the mean of its divisors is an integer number (107418128692).

Almost surely, 2^398981620843 is an apocalyptic number.

398981620843 is a deficient number, since it is larger than the sum of its proper divisors (30690893925).

398981620843 is a wasteful number, since it uses less digits than its factorization.

398981620843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30690893924.

The product of its (nonzero) digits is 17915904, while the sum is 61.

The spelling of 398981620843 in words is "three hundred ninety-eight billion, nine hundred eighty-one million, six hundred twenty thousand, eight hundred forty-three".