29861081 has 4 divisors (see below), whose sum is σ = 29874612. Its totient is φ = 29847552.

The previous prime is 29861077. The next prime is 29861089. The reversal of 29861081 is 18016892.

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

It can be written as a sum of positive squares in 2 ways, for example, as 17505856 + 12355225 = 4184^2 + 3515^2 .

It is a cyclic number.

It is not a de Polignac number, because 29861081 - 2² = 29861077 is a prime.

It is a super-2 number, since 2×29861081² = 1783368316977122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (29861089) 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, 2600 + ... + 8153.

It is an arithmetic number, because the mean of its divisors is an integer number (7468653).

Almost surely, 2^29861081 is an apocalyptic number.

It is an amenable number.

29861081 is a deficient number, since it is larger than the sum of its proper divisors (13531).

29861081 is a wasteful number, since it uses less digits than its factorization.

29861081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13530.

The product of its (nonzero) digits is 6912, while the sum is 35.

The square root of 29861081 is about 5464.5293484435. The cubic root of 29861081 is about 310.2428932305.

The spelling of 29861081 in words is "twenty-nine million, eight hundred sixty-one thousand, eighty-one".