1138944951 has 12 divisors (see below), whose sum is σ = 1645438600. Its totient is φ = 759160080.

The previous prime is 1138944941. The next prime is 1138944973. The reversal of 1138944951 is 1594498311.

It is not a de Polignac number, because 1138944951 - 2⁶ = 1138944887 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1138944897 and 1138944906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1138944941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 80400 + ... + 93498.

Almost surely, 2^1138944951 is an apocalyptic number.

1138944951 is a deficient number, since it is larger than the sum of its proper divisors (506493649).

1138944951 is a wasteful number, since it uses less digits than its factorization.

1138944951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22766 (or 22763 counting only the distinct ones).

The product of its digits is 155520, while the sum is 45.

The square root of 1138944951 is about 33748.2584884020. The cubic root of 1138944951 is about 1044.3215611171.

The spelling of 1138944951 in words is "one billion, one hundred thirty-eight million, nine hundred forty-four thousand, nine hundred fifty-one".