61929161 has 4 divisors (see below), whose sum is σ = 70776192. Its totient is φ = 53082132.

The previous prime is 61929149. The next prime is 61929163. The reversal of 61929161 is 16192916.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61929161 - 2¹⁴ = 61912777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61929163) 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, 4423505 + ... + 4423518.

It is an arithmetic number, because the mean of its divisors is an integer number (17694048).

Almost surely, 2^61929161 is an apocalyptic number.

It is an amenable number.

61929161 is a deficient number, since it is larger than the sum of its proper divisors (8847031).

61929161 is an equidigital number, since it uses as much as digits as its factorization.

61929161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8847030.

The product of its digits is 5832, while the sum is 35.

The square root of 61929161 is about 7869.5083073849. The cubic root of 61929161 is about 395.6383653051.

The spelling of 61929161 in words is "sixty-one million, nine hundred twenty-nine thousand, one hundred sixty-one".