61868771 has 4 divisors (see below), whose sum is σ = 62652000. Its totient is φ = 61085544.

The previous prime is 61868759. The next prime is 61868809. The reversal of 61868771 is 17786816.

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 61868771 - 2¹⁰ = 61867747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61868711) 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, 391496 + ... + 391653.

It is an arithmetic number, because the mean of its divisors is an integer number (15663000).

Almost surely, 2^61868771 is an apocalyptic number.

61868771 is a deficient number, since it is larger than the sum of its proper divisors (783229).

61868771 is an equidigital number, since it uses as much as digits as its factorization.

61868771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 783228.

The product of its digits is 112896, while the sum is 44.

The square root of 61868771 is about 7865.6704100795. The cubic root of 61868771 is about 395.5097217013.

The spelling of 61868771 in words is "sixty-one million, eight hundred sixty-eight thousand, seven hundred seventy-one".