61583943 has 4 divisors (see below), whose sum is σ = 82111928. Its totient is φ = 41055960.

The previous prime is 61583881. The next prime is 61583969. The reversal of 61583943 is 34938516.

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

It is not a de Polignac number, because 61583943 - 2¹⁰ = 61582919 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61583243) 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, 10263988 + ... + 10263993.

It is an arithmetic number, because the mean of its divisors is an integer number (20527982).

Almost surely, 2^61583943 is an apocalyptic number.

61583943 is a deficient number, since it is larger than the sum of its proper divisors (20527985).

61583943 is a wasteful number, since it uses less digits than its factorization.

61583943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20527984.

The product of its digits is 77760, while the sum is 39.

The square root of 61583943 is about 7847.5437558513. The cubic root of 61583943 is about 394.9018460384.

It can be divided in two parts, 61583 and 943, that added together give a palindrome (62526).

The spelling of 61583943 in words is "sixty-one million, five hundred eighty-three thousand, nine hundred forty-three".