29219431 has 2 divisors, whose sum is σ = 29219432. Its totient is φ = 29219430.

The previous prime is 29219417. The next prime is 29219459. The reversal of 29219431 is 13491292.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-29219431 is a prime.

It is a super-2 number, since 2×29219431² = 1707550295927522, which contains 22 as substring.

It is a Chen prime.

It is the 5406-th Hogben number.

It is a junction number, because it is equal to n+sod(n) for n = 29219393 and 29219402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (29219461) by changing a digit.

It is a nontrivial repunit in base 5405.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14609715 + 14609716.

It is an arithmetic number, because the mean of its divisors is an integer number (14609716).

Almost surely, 2^29219431 is an apocalyptic number.

29219431 is a deficient number, since it is larger than the sum of its proper divisors (1).

29219431 is an equidigital number, since it uses as much as digits as its factorization.

29219431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888, while the sum is 31.

The square root of 29219431 is about 5405.5000693738. The cubic root of 29219431 is about 308.0046346354.

The spelling of 29219431 in words is "twenty-nine million, two hundred nineteen thousand, four hundred thirty-one".