29135961 has 6 divisors (see below), whose sum is σ = 42085290. Its totient is φ = 19423968.

The previous prime is 29135957. The next prime is 29135969. The reversal of 29135961 is 16953192.

It can be written as a sum of positive squares in only one way, i.e., 23040000 + 6095961 = 4800^2 + 2469^2 .

It is not a de Polignac number, because 29135961 - 2² = 29135957 is a prime.

It is not an unprimeable number, because it can be changed into a prime (29135969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1618656 + ... + 1618673.

It is an arithmetic number, because the mean of its divisors is an integer number (7014215).

Almost surely, 2^29135961 is an apocalyptic number.

It is an amenable number.

29135961 is a deficient number, since it is larger than the sum of its proper divisors (12949329).

29135961 is a wasteful number, since it uses less digits than its factorization.

29135961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3237335 (or 3237332 counting only the distinct ones).

The product of its digits is 14580, while the sum is 36.

The square root of 29135961 is about 5397.7737077429. The cubic root of 29135961 is about 307.7110666720.

The spelling of 29135961 in words is "twenty-nine million, one hundred thirty-five thousand, nine hundred sixty-one".