929389391 has 4 divisors (see below), whose sum is σ = 1062159312. Its totient is φ = 796619472.

The previous prime is 929389387. The next prime is 929389399. The reversal of 929389391 is 193983929.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 193983929 = 29 ⋅6689101.

It is a cyclic number.

It is not a de Polignac number, because 929389391 - 2² = 929389387 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (929389399) 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 3 ways as a sum of consecutive naturals, for example, 66384950 + ... + 66384963.

It is an arithmetic number, because the mean of its divisors is an integer number (265539828).

Almost surely, 2^929389391 is an apocalyptic number.

929389391 is a deficient number, since it is larger than the sum of its proper divisors (132769921).

929389391 is a wasteful number, since it uses less digits than its factorization.

929389391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132769920.

The product of its digits is 944784, while the sum is 53.

The square root of 929389391 is about 30485.8883911885. Note that the first 3 decimals coincide. The cubic root of 929389391 is about 975.8863352890.

The spelling of 929389391 in words is "nine hundred twenty-nine million, three hundred eighty-nine thousand, three hundred ninety-one".