61984429 has 4 divisors (see below), whose sum is σ = 66752476. Its totient is φ = 57216384.

The previous prime is 61984423. The next prime is 61984463. The reversal of 61984429 is 92448916.

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 14402025 + 47582404 = 3795^2 + 6898^2 .

It is a cyclic number.

It is not a de Polignac number, because 61984429 - 2³ = 61984421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61984421) 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, 2384004 + ... + 2384029.

It is an arithmetic number, because the mean of its divisors is an integer number (16688119).

Almost surely, 2^61984429 is an apocalyptic number.

It is an amenable number.

61984429 is a deficient number, since it is larger than the sum of its proper divisors (4768047).

61984429 is a wasteful number, since it uses less digits than its factorization.

61984429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4768046.

The product of its digits is 124416, while the sum is 43.

The square root of 61984429 is about 7873.0190524347. The cubic root of 61984429 is about 395.7560246830.

The spelling of 61984429 in words is "sixty-one million, nine hundred eighty-four thousand, four hundred twenty-nine".