29139461 has 16 divisors (see below), whose sum is σ = 33356400. Its totient is φ = 25256448.

The previous prime is 29139449. The next prime is 29139463. The reversal of 29139461 is 16493192.

It can be written as a sum of positive squares in 8 ways, for example, as 1943236 + 27196225 = 1394^2 + 5215^2 .

It is not a de Polignac number, because 29139461 - 2¹⁰ = 29138437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29139463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12905 + ... + 14993.

It is an arithmetic number, because the mean of its divisors is an integer number (2084775).

Almost surely, 2^29139461 is an apocalyptic number.

It is an amenable number.

29139461 is a deficient number, since it is larger than the sum of its proper divisors (4216939).

29139461 is a wasteful number, since it uses less digits than its factorization.

29139461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2168.

The product of its digits is 11664, while the sum is 35.

The square root of 29139461 is about 5398.0979057442. The cubic root of 29139461 is about 307.7233875929.

The spelling of 29139461 in words is "twenty-nine million, one hundred thirty-nine thousand, four hundred sixty-one".