61682129 has 4 divisors (see below), whose sum is σ = 61701120. Its totient is φ = 61663140.

The previous prime is 61682123. The next prime is 61682191. The reversal of 61682129 is 92128616.

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 a de Polignac number, because none of the positive numbers 2^k-61682129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61682123) 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, 3257 + ... + 11574.

It is an arithmetic number, because the mean of its divisors is an integer number (15425280).

Almost surely, 2^61682129 is an apocalyptic number.

It is an amenable number.

61682129 is a deficient number, since it is larger than the sum of its proper divisors (18991).

61682129 is a wasteful number, since it uses less digits than its factorization.

61682129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18990.

The product of its digits is 10368, while the sum is 35.

The square root of 61682129 is about 7853.7971071323. The cubic root of 61682129 is about 395.1116044198. Note that the first 3 decimals are identical.

The spelling of 61682129 in words is "sixty-one million, six hundred eighty-two thousand, one hundred twenty-nine".