61690529 has 8 divisors (see below), whose sum is σ = 62542368. Its totient is φ = 60844000.

The previous prime is 61690523. The next prime is 61690553. The reversal of 61690529 is 92509616.

61690529 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 61690529 - 2²⁰ = 60641953 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 61690492 and 61690501.

It is not an unprimeable number, because it can be changed into a prime (61690523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25709 + ... + 28005.

It is an arithmetic number, because the mean of its divisors is an integer number (7817796).

Almost surely, 2^61690529 is an apocalyptic number.

It is an amenable number.

61690529 is a deficient number, since it is larger than the sum of its proper divisors (851839).

61690529 is a wasteful number, since it uses less digits than its factorization.

61690529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2655.

The product of its (nonzero) digits is 29160, while the sum is 38.

The square root of 61690529 is about 7854.3318621000. The cubic root of 61690529 is about 395.1295393110.

The spelling of 61690529 in words is "sixty-one million, six hundred ninety thousand, five hundred twenty-nine".