61840771 has 4 divisors (see below), whose sum is σ = 63007632. Its totient is φ = 60673912.

The previous prime is 61840739. The next prime is 61840817. The reversal of 61840771 is 17704816.

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 61840771 - 2⁵ = 61840739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61840711) 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, 583351 + ... + 583456.

It is an arithmetic number, because the mean of its divisors is an integer number (15751908).

Almost surely, 2^61840771 is an apocalyptic number.

61840771 is a deficient number, since it is larger than the sum of its proper divisors (1166861).

61840771 is a wasteful number, since it uses less digits than its factorization.

61840771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1166860.

The product of its (nonzero) digits is 9408, while the sum is 34.

The square root of 61840771 is about 7863.8903222260. The cubic root of 61840771 is about 395.4500473127.

The spelling of 61840771 in words is "sixty-one million, eight hundred forty thousand, seven hundred seventy-one".