1238929983 has 12 divisors (see below), whose sum is σ = 1867373040. Its totient is φ = 790042176.

The previous prime is 1238929981. The next prime is 1238929987. The reversal of 1238929983 is 3899298321.

1238929983 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1238929983 - 2¹ = 1238929981 is a prime.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1238929981) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2992378 + ... + 2992791.

It is an arithmetic number, because the mean of its divisors is an integer number (155614420).

Almost surely, 2^1238929983 is an apocalyptic number.

1238929983 is a deficient number, since it is larger than the sum of its proper divisors (628443057).

1238929983 is a wasteful number, since it uses less digits than its factorization.

1238929983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5985198 (or 5985195 counting only the distinct ones).

The product of its digits is 1679616, while the sum is 54.

The square root of 1238929983 is about 35198.4372238314. The cubic root of 1238929983 is about 1074.0279608421.

The spelling of 1238929983 in words is "one billion, two hundred thirty-eight million, nine hundred twenty-nine thousand, nine hundred eighty-three".