61690441 has 4 divisors (see below), whose sum is σ = 61948800. Its totient is φ = 61432084.

The previous prime is 61690379. The next prime is 61690471. The reversal of 61690441 is 14409616.

61690441 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61690441 - 2⁷ = 61690313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61690471) 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 3 ways as a sum of consecutive naturals, for example, 128821 + ... + 129298.

It is an arithmetic number, because the mean of its divisors is an integer number (15487200).

Almost surely, 2^61690441 is an apocalyptic number.

It is an amenable number.

61690441 is a deficient number, since it is larger than the sum of its proper divisors (258359).

61690441 is a wasteful number, since it uses less digits than its factorization.

61690441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258358.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 61690441 is about 7854.3262600939. The cubic root of 61690441 is about 395.1293514301.

The spelling of 61690441 in words is "sixty-one million, six hundred ninety thousand, four hundred forty-one".