71620085 has 8 divisors (see below), whose sum is σ = 86733240. Its totient is φ = 56769984.

The previous prime is 71620079. The next prime is 71620093. The reversal of 71620085 is 58002617.

It can be written as a sum of positive squares in 4 ways, for example, as 26770276 + 44849809 = 5174^2 + 6697^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 71620085 - 2¹² = 71615989 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65162 + ... + 66251.

It is an arithmetic number, because the mean of its divisors is an integer number (10841655).

Almost surely, 2^71620085 is an apocalyptic number.

It is an amenable number.

71620085 is a deficient number, since it is larger than the sum of its proper divisors (15113155).

71620085 is a wasteful number, since it uses less digits than its factorization.

71620085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131527.

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 71620085 is about 8462.8650585957. The cubic root of 71620085 is about 415.2837561964.

The spelling of 71620085 in words is "seventy-one million, six hundred twenty thousand, eighty-five".