29612381 has 2 divisors, whose sum is σ = 29612382. Its totient is φ = 29612380.

The previous prime is 29612371. The next prime is 29612383. The reversal of 29612381 is 18321692.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23609881 + 6002500 = 4859^2 + 2450^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-29612381 is a prime.

It is a super-2 number, since 2×29612381² = 1753786216978322, which contains 22 as substring.

Together with 29612383, it forms a pair of twin primes.

It is a Chen prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (29612383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14806190 + 14806191.

It is an arithmetic number, because the mean of its divisors is an integer number (14806191).

Almost surely, 2^29612381 is an apocalyptic number.

It is an amenable number.

29612381 is a deficient number, since it is larger than the sum of its proper divisors (1).

29612381 is an equidigital number, since it uses as much as digits as its factorization.

29612381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 32.

The square root of 29612381 is about 5441.7259210659. The cubic root of 29612381 is about 309.3791981337.

The spelling of 29612381 in words is "twenty-nine million, six hundred twelve thousand, three hundred eighty-one".