61690442 has 8 divisors (see below), whose sum is σ = 100948032. Its totient is φ = 28041100.

The previous prime is 61690379. The next prime is 61690471. The reversal of 61690442 is 24409616.

It is a happy number.

61690442 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 junction number, because it is equal to n+sod(n) for n = 61690399 and 61690408.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1402034 + ... + 1402077.

It is an arithmetic number, because the mean of its divisors is an integer number (12618504).

Almost surely, 2^61690442 is an apocalyptic number.

61690442 is a deficient number, since it is larger than the sum of its proper divisors (39257590).

61690442 is a wasteful number, since it uses less digits than its factorization.

61690442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2804124.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 61690442 is about 7854.3263237530. The cubic root of 61690442 is about 395.1293535651.

The spelling of 61690442 in words is "sixty-one million, six hundred ninety thousand, four hundred forty-two".