3998558139 has 4 divisors (see below), whose sum is σ = 5331410856. Its totient is φ = 2665705424.

The previous prime is 3998558101. The next prime is 3998558149. The reversal of 3998558139 is 9318558993.

It is a happy number.

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 3998558139 - 2¹⁷ = 3998427067 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3998558149) 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, 666426354 + ... + 666426359.

It is an arithmetic number, because the mean of its divisors is an integer number (1332852714).

Almost surely, 2^3998558139 is an apocalyptic number.

3998558139 is a deficient number, since it is larger than the sum of its proper divisors (1332852717).

3998558139 is a wasteful number, since it uses less digits than its factorization.

3998558139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1332852716.

The product of its digits is 10497600, while the sum is 60.

The square root of 3998558139 is about 63234.1532638811. The cubic root of 3998558139 is about 1587.2102947402.

The spelling of 3998558139 in words is "three billion, nine hundred ninety-eight million, five hundred fifty-eight thousand, one hundred thirty-nine".