61868773 has 4 divisors (see below), whose sum is σ = 63540940. Its totient is φ = 60196608.

The previous prime is 61868759. The next prime is 61868809. The reversal of 61868773 is 37786816.

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

It can be written as a sum of positive squares in 2 ways, for example, as 47858724 + 14010049 = 6918^2 + 3743^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61868773 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 (61868473) 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, 836028 + ... + 836101.

It is an arithmetic number, because the mean of its divisors is an integer number (15885235).

Almost surely, 2^61868773 is an apocalyptic number.

It is an amenable number.

61868773 is a deficient number, since it is larger than the sum of its proper divisors (1672167).

61868773 is a wasteful number, since it uses less digits than its factorization.

61868773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1672166.

The product of its digits is 338688, while the sum is 46.

The square root of 61868773 is about 7865.6705372142. The cubic root of 61868773 is about 395.5097259632.

The spelling of 61868773 in words is "sixty-one million, eight hundred sixty-eight thousand, seven hundred seventy-three".