71727461 has 4 divisors (see below), whose sum is σ = 77244972. Its totient is φ = 66209952.

The previous prime is 71727457. The next prime is 71727463. The reversal of 71727461 is 16472717.

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 25908100 + 45819361 = 5090^2 + 6769^2 .

It is a cyclic number.

It is not a de Polignac number, because 71727461 - 2² = 71727457 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 (71727463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2758736 + ... + 2758761.

It is an arithmetic number, because the mean of its divisors is an integer number (19311243).

Almost surely, 2^71727461 is an apocalyptic number.

It is an amenable number.

71727461 is a deficient number, since it is larger than the sum of its proper divisors (5517511).

71727461 is a wasteful number, since it uses less digits than its factorization.

71727461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5517510.

The product of its digits is 16464, while the sum is 35.

The square root of 71727461 is about 8469.2066334457. The cubic root of 71727461 is about 415.4911898263.

The spelling of 71727461 in words is "seventy-one million, seven hundred twenty-seven thousand, four hundred sixty-one".