1129239381 has 32 divisors (see below), whose sum is σ = 1590076800. Its totient is φ = 711809280.

The previous prime is 1129239379. The next prime is 1129239401. The reversal of 1129239381 is 1839329211.

It is not a de Polignac number, because 1129239381 - 2¹ = 1129239379 is a prime.

It is a super-2 number, since 2×1129239381² = 2550363159202526322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1129239301) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2064150 + ... + 2064696.

It is an arithmetic number, because the mean of its divisors is an integer number (49689900).

Almost surely, 2^1129239381 is an apocalyptic number.

It is an amenable number.

1129239381 is a deficient number, since it is larger than the sum of its proper divisors (460837419).

1129239381 is a wasteful number, since it uses less digits than its factorization.

1129239381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1029.

The product of its digits is 23328, while the sum is 39.

The square root of 1129239381 is about 33604.1571981801. The cubic root of 1129239381 is about 1041.3466840044.

The spelling of 1129239381 in words is "one billion, one hundred twenty-nine million, two hundred thirty-nine thousand, three hundred eighty-one".