61234643 has 4 divisors (see below), whose sum is σ = 61675320. Its totient is φ = 60793968.

The previous prime is 61234639. The next prime is 61234673. The reversal of 61234643 is 34643216.

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

It is a cyclic number.

It is not a de Polignac number, because 61234643 - 2² = 61234639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61234603) 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, 220130 + ... + 220407.

It is an arithmetic number, because the mean of its divisors is an integer number (15418830).

Almost surely, 2^61234643 is an apocalyptic number.

61234643 is a deficient number, since it is larger than the sum of its proper divisors (440677).

61234643 is a wasteful number, since it uses less digits than its factorization.

61234643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440676.

The product of its digits is 10368, while the sum is 29.

The square root of 61234643 is about 7825.2567370023. The cubic root of 61234643 is about 394.1538110421.

Adding to 61234643 its reverse (34643216), we get a palindrome (95877859).

The spelling of 61234643 in words is "sixty-one million, two hundred thirty-four thousand, six hundred forty-three".