1929311979 has 16 divisors (see below), whose sum is σ = 3019362048. Its totient is φ = 1072667232.

The previous prime is 1929311903. The next prime is 1929311983. The reversal of 1929311979 is 9791139291.

It is not a de Polignac number, because 1929311979 - 2⁸ = 1929311723 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1929310979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1240737 + ... + 1242290.

It is an arithmetic number, because the mean of its divisors is an integer number (188710128).

Almost surely, 2^1929311979 is an apocalyptic number.

1929311979 is a deficient number, since it is larger than the sum of its proper divisors (1090050069).

1929311979 is a wasteful number, since it uses less digits than its factorization.

1929311979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2483074.

The product of its digits is 275562, while the sum is 51.

The square root of 1929311979 is about 43923.9340109695. The cubic root of 1929311979 is about 1244.8991018375.

The spelling of 1929311979 in words is "one billion, nine hundred twenty-nine million, three hundred eleven thousand, nine hundred seventy-nine".