398393914139 has 4 divisors (see below), whose sum is σ = 429039599856. Its totient is φ = 367748228424.

The previous prime is 398393914013. The next prime is 398393914187. The reversal of 398393914139 is 931419393893.

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 398393914139 - 2¹⁶ = 398393848603 is a prime.

It is a super-2 number, since 2×398393914139² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (398393914189) 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, 15322842839 + ... + 15322842864.

It is an arithmetic number, because the mean of its divisors is an integer number (107259899964).

Almost surely, 2^398393914139 is an apocalyptic number.

398393914139 is a deficient number, since it is larger than the sum of its proper divisors (30645685717).

398393914139 is a wasteful number, since it uses less digits than its factorization.

398393914139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30645685716.

The product of its digits is 17006112, while the sum is 62.

The spelling of 398393914139 in words is "three hundred ninety-eight billion, three hundred ninety-three million, nine hundred fourteen thousand, one hundred thirty-nine".