61994205 has 48 divisors (see below), whose sum is σ = 132263040. Its totient is φ = 26158464.

The previous prime is 61994201. The next prime is 61994227. The reversal of 61994205 is 50249916.

It is not a de Polignac number, because 61994205 - 2² = 61994201 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61994205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61994201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3475 + ... + 11664.

It is an arithmetic number, because the mean of its divisors is an integer number (2755480).

Almost surely, 2^61994205 is an apocalyptic number.

61994205 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

61994205 is an abundant number, since it is smaller than the sum of its proper divisors (70268835).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61994205 is a wasteful number, since it uses less digits than its factorization.

61994205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15170 (or 15167 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 61994205 is about 7873.6398825448. The cubic root of 61994205 is about 395.7768294108.

It can be divided in two parts, 6199 and 4205, that added together give a square (10404 = 102²).

The spelling of 61994205 in words is "sixty-one million, nine hundred ninety-four thousand, two hundred five".