29197990961 has 4 divisors (see below), whose sum is σ = 29910137124. Its totient is φ = 28485844800.

The previous prime is 29197990957. The next prime is 29197990999. The reversal of 29197990961 is 16909979192.

It is a happy number.

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 16635840400 + 12562150561 = 128980^2 + 112081^2 .

It is a cyclic number.

It is not a de Polignac number, because 29197990961 - 2² = 29197990957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 29197990894 and 29197990903.

It is not an unprimeable number, because it can be changed into a prime (29197990361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 356073020 + ... + 356073101.

It is an arithmetic number, because the mean of its divisors is an integer number (7477534281).

Almost surely, 2^29197990961 is an apocalyptic number.

It is an amenable number.

29197990961 is a deficient number, since it is larger than the sum of its proper divisors (712146163).

29197990961 is an equidigital number, since it uses as much as digits as its factorization.

29197990961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 712146162.

The product of its (nonzero) digits is 4960116, while the sum is 62.

The spelling of 29197990961 in words is "twenty-nine billion, one hundred ninety-seven million, nine hundred ninety thousand, nine hundred sixty-one".