61789429 has 4 divisors (see below), whose sum is σ = 66542476. Its totient is φ = 57036384.

The previous prime is 61789393. The next prime is 61789439. The reversal of 61789429 is 92498716.

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 32467204 + 29322225 = 5698^2 + 5415^2 .

It is a cyclic number.

It is not a de Polignac number, because 61789429 - 2¹⁵ = 61756661 is a prime.

It is a super-2 number, since 2×61789429² = 7635867072292082, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61789439) 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 3 ways as a sum of consecutive naturals, for example, 2376504 + ... + 2376529.

It is an arithmetic number, because the mean of its divisors is an integer number (16635619).

Almost surely, 2^61789429 is an apocalyptic number.

It is an amenable number.

61789429 is a deficient number, since it is larger than the sum of its proper divisors (4753047).

61789429 is a wasteful number, since it uses less digits than its factorization.

61789429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4753046.

The product of its digits is 217728, while the sum is 46.

The square root of 61789429 is about 7860.6252295857. The cubic root of 61789429 is about 395.3405789832.

The spelling of 61789429 in words is "sixty-one million, seven hundred eighty-nine thousand, four hundred twenty-nine".