29399975893 has 4 divisors (see below), whose sum is σ = 29418835680. Its totient is φ = 29381116108.

The previous prime is 29399975879. The next prime is 29399975909. The reversal of 29399975893 is 39857999392.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-29399975893 is a prime.

It is a super-2 number, since 2×29399975893² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29399975873) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9427555 + ... + 9430672.

It is an arithmetic number, because the mean of its divisors is an integer number (7354708920).

Almost surely, 2^29399975893 is an apocalyptic number.

It is an amenable number.

29399975893 is a deficient number, since it is larger than the sum of its proper divisors (18859787).

29399975893 is a wasteful number, since it uses less digits than its factorization.

29399975893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18859786.

The product of its digits is 297606960, while the sum is 73.

The spelling of 29399975893 in words is "twenty-nine billion, three hundred ninety-nine million, nine hundred seventy-five thousand, eight hundred ninety-three".