29311393 has 4 divisors (see below), whose sum is σ = 29322820. Its totient is φ = 29299968.

The previous prime is 29311379. The next prime is 29311441. The reversal of 29311393 is 39311392.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 17040384 + 12271009 = 4128^2 + 3503^2 .

It is a cyclic number.

It is not a de Polignac number, because 29311393 - 2⁹ = 29310881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (29311333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121 + ... + 7657.

It is an arithmetic number, because the mean of its divisors is an integer number (7330705).

Almost surely, 2^29311393 is an apocalyptic number.

It is an amenable number.

29311393 is a deficient number, since it is larger than the sum of its proper divisors (11427).

29311393 is an equidigital number, since it uses as much as digits as its factorization.

29311393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11426.

The product of its digits is 4374, while the sum is 31.

The square root of 29311393 is about 5413.9997229405. Note that the first 3 decimals coincide. The cubic root of 29311393 is about 308.3274227907.

Subtracting 29311393 from its reverse (39311392), we obtain a palindrome (9999999).

The spelling of 29311393 in words is "twenty-nine million, three hundred eleven thousand, three hundred ninety-three".