29909961 has 9 divisors (see below), whose sum is σ = 43226989. Its totient is φ = 19929036.

The previous prime is 29909941. The next prime is 29909969. The reversal of 29909961 is 16990992.

It is a happy number.

The square root of 29909961 is 5469.

It is a perfect power (a square), and thus also a powerful number.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 29909961 - 2⁷ = 29909833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (29909969) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 15496 + ... + 17318.

Almost surely, 2^29909961 is an apocalyptic number.

29909961 is the 5469-th square number.

29909961 is the 2735-th centered octagonal number.

It is an amenable number.

29909961 is a deficient number, since it is larger than the sum of its proper divisors (13317028).

29909961 is an frugal number, since it uses more digits than its factorization.

29909961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3652 (or 1826 counting only the distinct ones).

The product of its (nonzero) digits is 78732, while the sum is 45.

The cubic root of 29909961 is about 310.4120811859.

The spelling of 29909961 in words is "twenty-nine million, nine hundred nine thousand, nine hundred sixty-one".