61839523 has 4 divisors (see below), whose sum is σ = 65477160. Its totient is φ = 58201888.

The previous prime is 61839517. The next prime is 61839539. The reversal of 61839523 is 32593816.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61839523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61839553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1818793 + ... + 1818826.

It is an arithmetic number, because the mean of its divisors is an integer number (16369290).

Almost surely, 2^61839523 is an apocalyptic number.

61839523 is a deficient number, since it is larger than the sum of its proper divisors (3637637).

61839523 is a wasteful number, since it uses less digits than its factorization.

61839523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3637636.

The product of its digits is 38880, while the sum is 37.

The square root of 61839523 is about 7863.8109717872. The cubic root of 61839523 is about 395.4473871207.

The spelling of 61839523 in words is "sixty-one million, eight hundred thirty-nine thousand, five hundred twenty-three".