1123139958 has 16 divisors (see below), whose sum is σ = 2306990640. Its totient is φ = 364261536.

The previous prime is 1123139939. The next prime is 1123139959. The reversal of 1123139958 is 8599313211.

It is a super-2 number, since 2×1123139958² = 2522886730512483528, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123139959) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2529373 + ... + 2529816.

It is an arithmetic number, because the mean of its divisors is an integer number (144186915).

Almost surely, 2^1123139958 is an apocalyptic number.

1123139958 is an abundant number, since it is smaller than the sum of its proper divisors (1183850682).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1123139958 is a wasteful number, since it uses less digits than its factorization.

1123139958 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5059231.

The product of its digits is 58320, while the sum is 42.

The square root of 1123139958 is about 33513.2803228810. The cubic root of 1123139958 is about 1039.4684037399.

The spelling of 1123139958 in words is "one billion, one hundred twenty-three million, one hundred thirty-nine thousand, nine hundred fifty-eight".