988458139 has 4 divisors (see below), whose sum is σ = 988747200. Its totient is φ = 988169080.

The previous prime is 988458131. The next prime is 988458161. The reversal of 988458139 is 931854889.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 931854889 = 7 ⋅133122127.

It is a cyclic number.

It is not a de Polignac number, because 988458139 - 2³ = 988458131 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 988458139.

It is not an unprimeable number, because it can be changed into a prime (988458131) 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, 139339 + ... + 146260.

It is an arithmetic number, because the mean of its divisors is an integer number (247186800).

Almost surely, 2^988458139 is an apocalyptic number.

988458139 is a deficient number, since it is larger than the sum of its proper divisors (289061).

988458139 is a wasteful number, since it uses less digits than its factorization.

988458139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289060.

The product of its digits is 2488320, while the sum is 55.

The square root of 988458139 is about 31439.7541179953. The cubic root of 988458139 is about 996.1378157361.

The spelling of 988458139 in words is "nine hundred eighty-eight million, four hundred fifty-eight thousand, one hundred thirty-nine".