61868629 has 8 divisors (see below), whose sum is σ = 64091160. Its totient is φ = 59652096.

The previous prime is 61868621. The next prime is 61868641. The reversal of 61868629 is 92686816.

It can be written as a sum of positive squares in 4 ways, for example, as 10404 + 61858225 = 102^2 + 7865^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61868629 - 2³ = 61868621 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61868621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34417 + ... + 36169.

It is an arithmetic number, because the mean of its divisors is an integer number (8011395).

Almost surely, 2^61868629 is an apocalyptic number.

It is an amenable number.

61868629 is a deficient number, since it is larger than the sum of its proper divisors (2222531).

61868629 is a wasteful number, since it uses less digits than its factorization.

61868629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2999.

The product of its digits is 248832, while the sum is 46.

The square root of 61868629 is about 7865.6613835074. The cubic root of 61868629 is about 395.5094191124.

The spelling of 61868629 in words is "sixty-one million, eight hundred sixty-eight thousand, six hundred twenty-nine".