61840723 has 4 divisors (see below), whose sum is σ = 70675120. Its totient is φ = 53006328.

The previous prime is 61840717. The next prime is 61840729. The reversal of 61840723 is 32704816.

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

It is an interprime number because it is at equal distance from previous prime (61840717) and next prime (61840729).

It is a cyclic number.

It is not a de Polignac number, because 61840723 - 2²¹ = 59743571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61840729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4417188 + ... + 4417201.

It is an arithmetic number, because the mean of its divisors is an integer number (17668780).

Almost surely, 2^61840723 is an apocalyptic number.

61840723 is a deficient number, since it is larger than the sum of its proper divisors (8834397).

61840723 is an equidigital number, since it uses as much as digits as its factorization.

61840723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8834396.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 61840723 is about 7863.8872703009. The cubic root of 61840723 is about 395.4499449983.

The spelling of 61840723 in words is "sixty-one million, eight hundred forty thousand, seven hundred twenty-three".