61740223 has 2 divisors, whose sum is σ = 61740224. Its totient is φ = 61740222.

The previous prime is 61740221. The next prime is 61740229. The reversal of 61740223 is 32204716.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61740223 - 2¹ = 61740221 is a prime.

Together with 61740221, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61740221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30870111 + 30870112.

It is an arithmetic number, because the mean of its divisors is an integer number (30870112).

Almost surely, 2^61740223 is an apocalyptic number.

61740223 is a deficient number, since it is larger than the sum of its proper divisors (1).

61740223 is an equidigital number, since it uses as much as digits as its factorization.

61740223 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 61740223 is about 7857.4947025117. The cubic root of 61740223 is about 395.2356079821.

Adding to 61740223 its reverse (32204716), we get a palindrome (93944939).

The spelling of 61740223 in words is "sixty-one million, seven hundred forty thousand, two hundred twenty-three".