39998213393 has 4 divisors (see below), whose sum is σ = 40000607808. Its totient is φ = 39995818980.

The previous prime is 39998213287. The next prime is 39998213401. The reversal of 39998213393 is 39331289993.

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.

It is a cyclic number.

It is not a de Polignac number, because 39998213393 - 2¹⁴ = 39998197009 is a prime.

It is a super-3 number, since 3×39998213393³ (a number of 33 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39998213693) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1171973 + ... + 1205618.

It is an arithmetic number, because the mean of its divisors is an integer number (10000151952).

Almost surely, 2^39998213393 is an apocalyptic number.

It is an amenable number.

39998213393 is a deficient number, since it is larger than the sum of its proper divisors (2394415).

39998213393 is a wasteful number, since it uses less digits than its factorization.

39998213393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2394414.

The product of its digits is 8503056, while the sum is 59.

The spelling of 39998213393 in words is "thirty-nine billion, nine hundred ninety-eight million, two hundred thirteen thousand, three hundred ninety-three".