61740823 has 4 divisors (see below), whose sum is σ = 64990360. Its totient is φ = 58491288.

The previous prime is 61740817. The next prime is 61740829. The reversal of 61740823 is 32804716.

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 (61740817) and next prime (61740829).

It is a cyclic number.

It is not a de Polignac number, because 61740823 - 2¹³ = 61732631 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 (61740829) 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, 1624740 + ... + 1624777.

It is an arithmetic number, because the mean of its divisors is an integer number (16247590).

Almost surely, 2^61740823 is an apocalyptic number.

61740823 is a deficient number, since it is larger than the sum of its proper divisors (3249537).

61740823 is a wasteful number, since it uses less digits than its factorization.

61740823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3249536.

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

The square root of 61740823 is about 7857.5328825274. The cubic root of 61740823 is about 395.2368882960.

The spelling of 61740823 in words is "sixty-one million, seven hundred forty thousand, eight hundred twenty-three".