29131939 has 6 divisors (see below), whose sum is σ = 29553140. Its totient is φ = 28716660.

The previous prime is 29131903. The next prime is 29131943. The reversal of 29131939 is 93913192.

It is not a de Polignac number, because 29131939 - 2¹³ = 29123747 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 29131898 and 29131907.

It is not an unprimeable number, because it can be changed into a prime (29131969) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2152 + ... + 7930.

Almost surely, 2^29131939 is an apocalyptic number.

29131939 is a deficient number, since it is larger than the sum of its proper divisors (421201).

29131939 is an frugal number, since it uses more digits than its factorization.

29131939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5921 (or 5850 counting only the distinct ones).

The product of its digits is 13122, while the sum is 37.

The square root of 29131939 is about 5397.4011338792. The cubic root of 29131939 is about 307.6969069553.

The spelling of 29131939 in words is "twenty-nine million, one hundred thirty-one thousand, nine hundred thirty-nine".