61773823 has 4 divisors (see below), whose sum is σ = 62320608. Its totient is φ = 61227040.

The previous prime is 61773821. The next prime is 61773871. The reversal of 61773823 is 32837716.

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 61773823 - 2¹ = 61773821 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 (61773821) 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, 273223 + ... + 273448.

It is an arithmetic number, because the mean of its divisors is an integer number (15580152).

Almost surely, 2^61773823 is an apocalyptic number.

61773823 is a deficient number, since it is larger than the sum of its proper divisors (546785).

61773823 is a wasteful number, since it uses less digits than its factorization.

61773823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 546784.

The product of its digits is 42336, while the sum is 37.

The square root of 61773823 is about 7859.6324977699. The cubic root of 61773823 is about 395.3072927902.

It can be divided in two parts, 6177 and 3823, that added together give a 4-th power (10000 = 10⁴).

The spelling of 61773823 in words is "sixty-one million, seven hundred seventy-three thousand, eight hundred twenty-three".