61771423 has 4 divisors (see below), whose sum is σ = 70595920. Its totient is φ = 52946928.

The previous prime is 61771417. The next prime is 61771427. The reversal of 61771423 is 32417716.

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 61771423 - 2²¹ = 59674271 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 (61771427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4412238 + ... + 4412251.

It is an arithmetic number, because the mean of its divisors is an integer number (17648980).

Almost surely, 2^61771423 is an apocalyptic number.

61771423 is a deficient number, since it is larger than the sum of its proper divisors (8824497).

61771423 is an equidigital number, since it uses as much as digits as its factorization.

61771423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8824496.

The product of its digits is 7056, while the sum is 31.

The square root of 61771423 is about 7859.4798173925. The cubic root of 61771423 is about 395.3021733090.

The spelling of 61771423 in words is "sixty-one million, seven hundred seventy-one thousand, four hundred twenty-three".