29993431 has 4 divisors (see below), whose sum is σ = 32300632. Its totient is φ = 27686232.

The previous prime is 29993429. The next prime is 29993441. The reversal of 29993431 is 13439992.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 29993431 - 2¹ = 29993429 is a prime.

It is a super-2 number, since 2×29993431² = 1799211806303522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29993441) 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, 1153581 + ... + 1153606.

It is an arithmetic number, because the mean of its divisors is an integer number (8075158).

Almost surely, 2^29993431 is an apocalyptic number.

29993431 is a deficient number, since it is larger than the sum of its proper divisors (2307201).

29993431 is a wasteful number, since it uses less digits than its factorization.

29993431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2307200.

The product of its digits is 52488, while the sum is 40.

The square root of 29993431 is about 5476.6258773080. The cubic root of 29993431 is about 310.7005695950.

The spelling of 29993431 in words is "twenty-nine million, nine hundred ninety-three thousand, four hundred thirty-one".