29391109393 has 8 divisors (see below), whose sum is σ = 30383652096. Its totient is φ = 28401344400.

The previous prime is 29391109357. The next prime is 29391109421. The reversal of 29391109393 is 39390119392.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 29391109393 - 2¹⁷ = 29390978321 is a prime.

It is a super-2 number, since 2×29391109393² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (29391109343) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 672898 + ... + 715243.

It is an arithmetic number, because the mean of its divisors is an integer number (3797956512).

Almost surely, 2^29391109393 is an apocalyptic number.

It is an amenable number.

29391109393 is a deficient number, since it is larger than the sum of its proper divisors (992542703).

29391109393 is a wasteful number, since it uses less digits than its factorization.

29391109393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1388855.

The product of its (nonzero) digits is 354294, while the sum is 49.

Subtracting 29391109393 from its reverse (39390119392), we obtain a palindrome (9999009999).

The spelling of 29391109393 in words is "twenty-nine billion, three hundred ninety-one million, one hundred nine thousand, three hundred ninety-three".