1231930239 has 16 divisors (see below), whose sum is σ = 1702923264. Its totient is φ = 791595200.

The previous prime is 1231930223. The next prime is 1231930247. The reversal of 1231930239 is 9320391321.

It is not a de Polignac number, because 1231930239 - 2⁴ = 1231930223 is a prime.

It is a super-2 number, since 2×1231930239² = 3035304227525194242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231930289) 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 15 ways as a sum of consecutive naturals, for example, 50127 + ... + 70544.

It is an arithmetic number, because the mean of its divisors is an integer number (106432704).

Almost surely, 2^1231930239 is an apocalyptic number.

1231930239 is a deficient number, since it is larger than the sum of its proper divisors (470993025).

1231930239 is a wasteful number, since it uses less digits than its factorization.

1231930239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120798.

The product of its (nonzero) digits is 8748, while the sum is 33.

The square root of 1231930239 is about 35098.8637850287. The cubic root of 1231930239 is about 1072.0014476919.

The spelling of 1231930239 in words is "one billion, two hundred thirty-one million, nine hundred thirty thousand, two hundred thirty-nine".