29381661 has 12 divisors (see below), whose sum is σ = 44936892. Its totient is φ = 18435456.

The previous prime is 29381629. The next prime is 29381683. The reversal of 29381661 is 16618392.

It can be written as a sum of positive squares in 2 ways, for example, as 13461561 + 15920100 = 3669^2 + 3990^2 .

It is not a de Polignac number, because 29381661 - 2⁵ = 29381629 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29381621) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 95866 + ... + 96171.

It is an arithmetic number, because the mean of its divisors is an integer number (3744741).

Almost surely, 2^29381661 is an apocalyptic number.

It is an amenable number.

29381661 is a deficient number, since it is larger than the sum of its proper divisors (15555231).

29381661 is a wasteful number, since it uses less digits than its factorization.

29381661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192060 (or 192057 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 29381661 is about 5420.4853103758. The cubic root of 29381661 is about 308.5736099015.

The spelling of 29381661 in words is "twenty-nine million, three hundred eighty-one thousand, six hundred sixty-one".